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| <div class="subTitle">org.apache.commons.math3.random</div> |
| <h2 title="Class RandomDataImpl" class="title">Class RandomDataImpl</h2> |
| </div> |
| <div class="contentContainer"> |
| <ul class="inheritance"> |
| <li><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.commons.math3.random.RandomDataImpl</li> |
| </ul> |
| </li> |
| </ul> |
| <div class="description"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <dl> |
| <dt>All Implemented Interfaces:</dt> |
| <dd><a href="http://docs.oracle.com/javase/6/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</a>, <a href="../../../../../org/apache/commons/math3/random/RandomData.html" title="interface in org.apache.commons.math3.random">RandomData</a></dd> |
| </dl> |
| <hr> |
| <div class="block"><strong>Deprecated.</strong> |
| <div class="block"><i>to be removed in 4.0. Use <a href="../../../../../org/apache/commons/math3/random/RandomDataGenerator.html" title="class in org.apache.commons.math3.random"><code>RandomDataGenerator</code></a> instead</i></div> |
| </div> |
| <br> |
| <pre><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a> |
| public class <span class="strong">RandomDataImpl</span> |
| extends <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a> |
| implements <a href="../../../../../org/apache/commons/math3/random/RandomData.html" title="interface in org.apache.commons.math3.random">RandomData</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</a></pre> |
| <div class="block">Generates random deviates and other random data using a <a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html" title="interface in org.apache.commons.math3.random"><code>RandomGenerator</code></a> |
| instance to generate non-secure data and a <a href="http://docs.oracle.com/javase/6/docs/api/java/security/SecureRandom.html?is-external=true" title="class or interface in java.security"><code>SecureRandom</code></a> |
| instance to provide data for the <code>nextSecureXxx</code> methods. If no |
| <code>RandomGenerator</code> is provided in the constructor, the default is |
| to use a <a href="../../../../../org/apache/commons/math3/random/Well19937c.html" title="class in org.apache.commons.math3.random"><code>Well19937c</code></a> generator. To plug in a different |
| implementation, either implement <code>RandomGenerator</code> directly or |
| extend <a href="../../../../../org/apache/commons/math3/random/AbstractRandomGenerator.html" title="class in org.apache.commons.math3.random"><code>AbstractRandomGenerator</code></a>. |
| <p> |
| Supports reseeding the underlying pseudo-random number generator (PRNG). The |
| <code>SecurityProvider</code> and <code>Algorithm</code> used by the |
| <code>SecureRandom</code> instance can also be reset. |
| </p> |
| <p> |
| For details on the default PRNGs, see <a href="http://docs.oracle.com/javase/6/docs/api/java/util/Random.html?is-external=true" title="class or interface in java.util"><code>Random</code></a> and |
| <a href="http://docs.oracle.com/javase/6/docs/api/java/security/SecureRandom.html?is-external=true" title="class or interface in java.security"><code>SecureRandom</code></a>. |
| </p> |
| <p> |
| <strong>Usage Notes</strong>: |
| <ul> |
| <li> |
| Instance variables are used to maintain <code>RandomGenerator</code> and |
| <code>SecureRandom</code> instances used in data generation. Therefore, to |
| generate a random sequence of values or strings, you should use just |
| <strong>one</strong> <code>RandomDataGenerator</code> instance repeatedly.</li> |
| <li> |
| The "secure" methods are *much* slower. These should be used only when a |
| cryptographically secure random sequence is required. A secure random |
| sequence is a sequence of pseudo-random values which, in addition to being |
| well-dispersed (so no subsequence of values is an any more likely than other |
| subsequence of the the same length), also has the additional property that |
| knowledge of values generated up to any point in the sequence does not make |
| it any easier to predict subsequent values.</li> |
| <li> |
| When a new <code>RandomDataGenerator</code> is created, the underlying random |
| number generators are <strong>not</strong> initialized. If you do not |
| explicitly seed the default non-secure generator, it is seeded with the |
| current time in milliseconds plus the system identity hash code on first use. |
| The same holds for the secure generator. If you provide a <code>RandomGenerator</code> |
| to the constructor, however, this generator is not reseeded by the constructor |
| nor is it reseeded on first use.</li> |
| <li> |
| The <code>reSeed</code> and <code>reSeedSecure</code> methods delegate to the |
| corresponding methods on the underlying <code>RandomGenerator</code> and |
| <code>SecureRandom</code> instances. Therefore, <code>reSeed(long)</code> |
| fully resets the initial state of the non-secure random number generator (so |
| that reseeding with a specific value always results in the same subsequent |
| random sequence); whereas reSeedSecure(long) does <strong>not</strong> |
| reinitialize the secure random number generator (so secure sequences started |
| with calls to reseedSecure(long) won't be identical).</li> |
| <li> |
| This implementation is not synchronized. The underlying <code>RandomGenerator</code> |
| or <code>SecureRandom</code> instances are not protected by synchronization and |
| are not guaranteed to be thread-safe. Therefore, if an instance of this class |
| is concurrently utilized by multiple threads, it is the responsibility of |
| client code to synchronize access to seeding and data generation methods. |
| </li> |
| </ul> |
| </p></div> |
| <dl><dt><span class="strong">Version:</span></dt> |
| <dd>$Id: RandomDataImpl.java 1499808 2013-07-04 17:00:42Z sebb $</dd> |
| <dt><span class="strong">See Also:</span></dt><dd><a href="../../../../../serialized-form.html#org.apache.commons.math3.random.RandomDataImpl">Serialized Form</a></dd></dl> |
| </li> |
| </ul> |
| </div> |
| <div class="summary"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="constructor_summary"> |
| <!-- --> |
| </a> |
| <h3>Constructor Summary</h3> |
| <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Constructor Summary table, listing constructors, and an explanation"> |
| <caption><span>Constructors</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colOne" scope="col">Constructor and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#RandomDataImpl()">RandomDataImpl</a></strong>()</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Construct a RandomDataImpl, using a default random generator as the source |
| of randomness.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colOne"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#RandomDataImpl(org.apache.commons.math3.random.RandomGenerator)">RandomDataImpl</a></strong>(<a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html" title="interface in org.apache.commons.math3.random">RandomGenerator</a> rand)</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Construct a RandomDataImpl using the supplied <a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html" title="interface in org.apache.commons.math3.random"><code>RandomGenerator</code></a> as |
| the source of (non-secure) random data.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| <!-- ========== METHOD SUMMARY =========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="method_summary"> |
| <!-- --> |
| </a> |
| <h3>Method Summary</h3> |
| <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span>Methods</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>double</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextBeta(double, double)">nextBeta</a></strong>(double alpha, |
| double beta)</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Generates a random value from the <a href="../../../../../org/apache/commons/math3/distribution/BetaDistribution.html" title="class in org.apache.commons.math3.distribution"><code>Beta Distribution</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextBinomial(int, double)">nextBinomial</a></strong>(int numberOfTrials, |
| double probabilityOfSuccess)</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Generates a random value from the <a href="../../../../../org/apache/commons/math3/distribution/BinomialDistribution.html" title="class in org.apache.commons.math3.distribution"><code>Binomial Distribution</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>double</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextCauchy(double, double)">nextCauchy</a></strong>(double median, |
| double scale)</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Generates a random value from the <a href="../../../../../org/apache/commons/math3/distribution/CauchyDistribution.html" title="class in org.apache.commons.math3.distribution"><code>Cauchy Distribution</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>double</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextChiSquare(double)">nextChiSquare</a></strong>(double df)</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Generates a random value from the <a href="../../../../../org/apache/commons/math3/distribution/ChiSquaredDistribution.html" title="class in org.apache.commons.math3.distribution"><code>ChiSquare Distribution</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>double</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextExponential(double)">nextExponential</a></strong>(double mean)</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Generates a random value from the exponential distribution |
| with specified mean.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>double</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextF(double, double)">nextF</a></strong>(double numeratorDf, |
| double denominatorDf)</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Generates a random value from the <a href="../../../../../org/apache/commons/math3/distribution/FDistribution.html" title="class in org.apache.commons.math3.distribution"><code>F Distribution</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>double</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextGamma(double, double)">nextGamma</a></strong>(double shape, |
| double scale)</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Generates a random value from the |
| <a href="../../../../../org/apache/commons/math3/distribution/GammaDistribution.html" title="class in org.apache.commons.math3.distribution"><code>Gamma Distribution</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>double</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextGaussian(double, double)">nextGaussian</a></strong>(double mu, |
| double sigma)</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Generates a random value from the Normal (or Gaussian) distribution with |
| specified mean and standard deviation.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextHexString(int)">nextHexString</a></strong>(int len)</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Generates a random string of hex characters of length <code>len</code>.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextHypergeometric(int, int, int)">nextHypergeometric</a></strong>(int populationSize, |
| int numberOfSuccesses, |
| int sampleSize)</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Generates a random value from the <a href="../../../../../org/apache/commons/math3/distribution/HypergeometricDistribution.html" title="class in org.apache.commons.math3.distribution"><code>Hypergeometric Distribution</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextInt(int, int)">nextInt</a></strong>(int lower, |
| int upper)</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Generates a uniformly distributed random integer between <code>lower</code> |
| and <code>upper</code> (endpoints included).</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextInversionDeviate(org.apache.commons.math3.distribution.IntegerDistribution)">nextInversionDeviate</a></strong>(<a href="../../../../../org/apache/commons/math3/distribution/IntegerDistribution.html" title="interface in org.apache.commons.math3.distribution">IntegerDistribution</a> distribution)</code> |
| <div class="block"><strong>Deprecated.</strong> |
| <div class="block"><i>use the distribution's sample() method</i></div> |
| </div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>double</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextInversionDeviate(org.apache.commons.math3.distribution.RealDistribution)">nextInversionDeviate</a></strong>(<a href="../../../../../org/apache/commons/math3/distribution/RealDistribution.html" title="interface in org.apache.commons.math3.distribution">RealDistribution</a> distribution)</code> |
| <div class="block"><strong>Deprecated.</strong> |
| <div class="block"><i>use the distribution's sample() method</i></div> |
| </div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>long</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextLong(long, long)">nextLong</a></strong>(long lower, |
| long upper)</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Generates a uniformly distributed random long integer between |
| <code>lower</code> and <code>upper</code> (endpoints included).</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextPascal(int, double)">nextPascal</a></strong>(int r, |
| double p)</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Generates a random value from the <a href="../../../../../org/apache/commons/math3/distribution/PascalDistribution.html" title="class in org.apache.commons.math3.distribution"><code>Pascal Distribution</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>int[]</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextPermutation(int, int)">nextPermutation</a></strong>(int n, |
| int k)</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Generates an integer array of length <code>k</code> whose entries are selected |
| randomly, without repetition, from the integers <code>0, ..., n - 1</code> |
| (inclusive).</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>long</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextPoisson(double)">nextPoisson</a></strong>(double mean)</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Generates a random value from the Poisson distribution with the given |
| mean.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>[]</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextSample(java.util.Collection, int)">nextSample</a></strong>(<a href="http://docs.oracle.com/javase/6/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><?> c, |
| int k)</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Returns an array of <code>k</code> objects selected randomly from the |
| Collection <code>c</code>.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextSecureHexString(int)">nextSecureHexString</a></strong>(int len)</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Generates a random string of hex characters from a secure random |
| sequence.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextSecureInt(int, int)">nextSecureInt</a></strong>(int lower, |
| int upper)</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Generates a uniformly distributed random integer between <code>lower</code> |
| and <code>upper</code> (endpoints included) from a secure random sequence.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>long</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextSecureLong(long, long)">nextSecureLong</a></strong>(long lower, |
| long upper)</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Generates a uniformly distributed random long integer between |
| <code>lower</code> and <code>upper</code> (endpoints included) from a secure random |
| sequence.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>double</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextT(double)">nextT</a></strong>(double df)</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Generates a random value from the <a href="../../../../../org/apache/commons/math3/distribution/TDistribution.html" title="class in org.apache.commons.math3.distribution"><code>T Distribution</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>double</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextUniform(double, double)">nextUniform</a></strong>(double lower, |
| double upper)</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Generates a uniformly distributed random value from the open interval |
| <code>(lower, upper)</code> (i.e., endpoints excluded).</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>double</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextUniform(double, double, boolean)">nextUniform</a></strong>(double lower, |
| double upper, |
| boolean lowerInclusive)</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Generates a uniformly distributed random value from the interval |
| <code>(lower, upper)</code> or the interval <code>[lower, upper)</code>.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>double</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextWeibull(double, double)">nextWeibull</a></strong>(double shape, |
| double scale)</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Generates a random value from the <a href="../../../../../org/apache/commons/math3/distribution/WeibullDistribution.html" title="class in org.apache.commons.math3.distribution"><code>Weibull Distribution</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextZipf(int, double)">nextZipf</a></strong>(int numberOfElements, |
| double exponent)</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Generates a random value from the <a href="../../../../../org/apache/commons/math3/distribution/ZipfDistribution.html" title="class in org.apache.commons.math3.distribution"><code>Zipf Distribution</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#reSeed()">reSeed</a></strong>()</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Reseeds the random number generator with |
| <code>System.currentTimeMillis() + System.identityHashCode(this))</code>.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#reSeed(long)">reSeed</a></strong>(long seed)</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Reseeds the random number generator with the supplied seed.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#reSeedSecure()">reSeedSecure</a></strong>()</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Reseeds the secure random number generator with the current time in |
| milliseconds.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#reSeedSecure(long)">reSeedSecure</a></strong>(long seed)</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Reseeds the secure random number generator with the supplied seed.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#setSecureAlgorithm(java.lang.String, java.lang.String)">setSecureAlgorithm</a></strong>(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> algorithm, |
| <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> provider)</code> |
| <div class="block"><strong>Deprecated.</strong> </div> |
| <div class="block">Sets the PRNG algorithm for the underlying SecureRandom instance using |
| the Security Provider API.</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a name="methods_inherited_from_class_java.lang.Object"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from class java.lang.<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3> |
| <code><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</a></code></li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="constructor_detail"> |
| <!-- --> |
| </a> |
| <h3>Constructor Detail</h3> |
| <a name="RandomDataImpl()"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>RandomDataImpl</h4> |
| <pre>public RandomDataImpl()</pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block">Construct a RandomDataImpl, using a default random generator as the source |
| of randomness. |
| |
| <p>The default generator is a <a href="../../../../../org/apache/commons/math3/random/Well19937c.html" title="class in org.apache.commons.math3.random"><code>Well19937c</code></a> seeded |
| with <code>System.currentTimeMillis() + System.identityHashCode(this))</code>. |
| The generator is initialized and seeded on first use.</p></div> |
| </li> |
| </ul> |
| <a name="RandomDataImpl(org.apache.commons.math3.random.RandomGenerator)"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>RandomDataImpl</h4> |
| <pre>public RandomDataImpl(<a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html" title="interface in org.apache.commons.math3.random">RandomGenerator</a> rand)</pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block">Construct a RandomDataImpl using the supplied <a href="../../../../../org/apache/commons/math3/random/RandomGenerator.html" title="interface in org.apache.commons.math3.random"><code>RandomGenerator</code></a> as |
| the source of (non-secure) random data.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>rand</code> - the source of (non-secure) random data |
| (may be null, resulting in the default generator)</dd><dt><span class="strong">Since:</span></dt> |
| <dd>1.1</dd></dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <!-- ============ METHOD DETAIL ========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="method_detail"> |
| <!-- --> |
| </a> |
| <h3>Method Detail</h3> |
| <a name="nextHexString(int)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>nextHexString</h4> |
| <pre>public <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> nextHexString(int len) |
| throws <a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a></pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block">Generates a random string of hex characters of length <code>len</code>. |
| <p> |
| The generated string will be random, but not cryptographically |
| secure. To generate cryptographically secure strings, use |
| <a href="../../../../../org/apache/commons/math3/random/RandomData.html#nextSecureHexString(int)"><code>RandomData.nextSecureHexString(int)</code></a>. |
| </p> |
| <p> |
| <strong>Algorithm Description:</strong> hex strings are generated using a |
| 2-step process. |
| <ol> |
| <li><code>len / 2 + 1</code> binary bytes are generated using the underlying |
| Random</li> |
| <li>Each binary byte is translated into 2 hex digits</li> |
| </ol> |
| </p></div> |
| <dl> |
| <dt><strong>Specified by:</strong></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/random/RandomData.html#nextHexString(int)">nextHexString</a></code> in interface <code><a href="../../../../../org/apache/commons/math3/random/RandomData.html" title="interface in org.apache.commons.math3.random">RandomData</a></code></dd> |
| <dt><span class="strong">Parameters:</span></dt><dd><code>len</code> - the desired string length.</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>the random string.</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a></code> - if <code>len <= 0</code>.</dd></dl> |
| </li> |
| </ul> |
| <a name="nextInt(int, int)"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>nextInt</h4> |
| <pre>public int nextInt(int lower, |
| int upper) |
| throws <a href="../../../../../org/apache/commons/math3/exception/NumberIsTooLargeException.html" title="class in org.apache.commons.math3.exception">NumberIsTooLargeException</a></pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block">Generates a uniformly distributed random integer between <code>lower</code> |
| and <code>upper</code> (endpoints included). |
| <p> |
| The generated integer will be random, but not cryptographically secure. |
| To generate cryptographically secure integer sequences, use |
| <a href="../../../../../org/apache/commons/math3/random/RandomData.html#nextSecureInt(int, int)"><code>RandomData.nextSecureInt(int, int)</code></a>. |
| </p></div> |
| <dl> |
| <dt><strong>Specified by:</strong></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/random/RandomData.html#nextInt(int, int)">nextInt</a></code> in interface <code><a href="../../../../../org/apache/commons/math3/random/RandomData.html" title="interface in org.apache.commons.math3.random">RandomData</a></code></dd> |
| <dt><span class="strong">Parameters:</span></dt><dd><code>lower</code> - lower bound for generated integer</dd><dd><code>upper</code> - upper bound for generated integer</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>a random integer greater than or equal to <code>lower</code> |
| and less than or equal to <code>upper</code></dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/NumberIsTooLargeException.html" title="class in org.apache.commons.math3.exception">NumberIsTooLargeException</a></code> - if <code>lower >= upper</code></dd></dl> |
| </li> |
| </ul> |
| <a name="nextLong(long, long)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>nextLong</h4> |
| <pre>public long nextLong(long lower, |
| long upper) |
| throws <a href="../../../../../org/apache/commons/math3/exception/NumberIsTooLargeException.html" title="class in org.apache.commons.math3.exception">NumberIsTooLargeException</a></pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block">Generates a uniformly distributed random long integer between |
| <code>lower</code> and <code>upper</code> (endpoints included). |
| <p> |
| The generated long integer values will be random, but not |
| cryptographically secure. To generate cryptographically secure sequences |
| of longs, use <a href="../../../../../org/apache/commons/math3/random/RandomData.html#nextSecureLong(long, long)"><code>RandomData.nextSecureLong(long, long)</code></a>. |
| </p></div> |
| <dl> |
| <dt><strong>Specified by:</strong></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/random/RandomData.html#nextLong(long, long)">nextLong</a></code> in interface <code><a href="../../../../../org/apache/commons/math3/random/RandomData.html" title="interface in org.apache.commons.math3.random">RandomData</a></code></dd> |
| <dt><span class="strong">Parameters:</span></dt><dd><code>lower</code> - lower bound for generated long integer</dd><dd><code>upper</code> - upper bound for generated long integer</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>a random long integer greater than or equal to <code>lower</code> and |
| less than or equal to <code>upper</code></dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/NumberIsTooLargeException.html" title="class in org.apache.commons.math3.exception">NumberIsTooLargeException</a></code> - if <code>lower >= upper</code></dd></dl> |
| </li> |
| </ul> |
| <a name="nextSecureHexString(int)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>nextSecureHexString</h4> |
| <pre>public <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> nextSecureHexString(int len) |
| throws <a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a></pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block">Generates a random string of hex characters from a secure random |
| sequence. |
| <p> |
| If cryptographic security is not required, use |
| <a href="../../../../../org/apache/commons/math3/random/RandomData.html#nextHexString(int)"><code>RandomData.nextHexString(int)</code></a>. |
| </p> |
| <p> |
| <strong>Algorithm Description:</strong> hex strings are generated in |
| 40-byte segments using a 3-step process. |
| <ol> |
| <li> |
| 20 random bytes are generated using the underlying |
| <code>SecureRandom</code>.</li> |
| <li> |
| SHA-1 hash is applied to yield a 20-byte binary digest.</li> |
| <li> |
| Each byte of the binary digest is converted to 2 hex digits.</li> |
| </ol> |
| </p></div> |
| <dl> |
| <dt><strong>Specified by:</strong></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/random/RandomData.html#nextSecureHexString(int)">nextSecureHexString</a></code> in interface <code><a href="../../../../../org/apache/commons/math3/random/RandomData.html" title="interface in org.apache.commons.math3.random">RandomData</a></code></dd> |
| <dt><span class="strong">Parameters:</span></dt><dd><code>len</code> - the length of the string to be generated</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>a random string of hex characters of length <code>len</code></dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a></code> - if <code>len <= 0</code></dd></dl> |
| </li> |
| </ul> |
| <a name="nextSecureInt(int, int)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>nextSecureInt</h4> |
| <pre>public int nextSecureInt(int lower, |
| int upper) |
| throws <a href="../../../../../org/apache/commons/math3/exception/NumberIsTooLargeException.html" title="class in org.apache.commons.math3.exception">NumberIsTooLargeException</a></pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block">Generates a uniformly distributed random integer between <code>lower</code> |
| and <code>upper</code> (endpoints included) from a secure random sequence. |
| <p> |
| Sequences of integers generated using this method will be |
| cryptographically secure. If cryptographic security is not required, |
| <a href="../../../../../org/apache/commons/math3/random/RandomData.html#nextInt(int, int)"><code>RandomData.nextInt(int, int)</code></a> should be used instead of this method.</p> |
| <p> |
| <strong>Definition</strong>: |
| <a href="http://en.wikipedia.org/wiki/Cryptographically_secure_pseudo-random_number_generator"> |
| Secure Random Sequence</a></p></div> |
| <dl> |
| <dt><strong>Specified by:</strong></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/random/RandomData.html#nextSecureInt(int, int)">nextSecureInt</a></code> in interface <code><a href="../../../../../org/apache/commons/math3/random/RandomData.html" title="interface in org.apache.commons.math3.random">RandomData</a></code></dd> |
| <dt><span class="strong">Parameters:</span></dt><dd><code>lower</code> - lower bound for generated integer</dd><dd><code>upper</code> - upper bound for generated integer</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>a random integer greater than or equal to <code>lower</code> and less |
| than or equal to <code>upper</code>.</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/NumberIsTooLargeException.html" title="class in org.apache.commons.math3.exception">NumberIsTooLargeException</a></code> - if <code>lower >= upper</code>.</dd></dl> |
| </li> |
| </ul> |
| <a name="nextSecureLong(long, long)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>nextSecureLong</h4> |
| <pre>public long nextSecureLong(long lower, |
| long upper) |
| throws <a href="../../../../../org/apache/commons/math3/exception/NumberIsTooLargeException.html" title="class in org.apache.commons.math3.exception">NumberIsTooLargeException</a></pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block">Generates a uniformly distributed random long integer between |
| <code>lower</code> and <code>upper</code> (endpoints included) from a secure random |
| sequence. |
| <p> |
| Sequences of long values generated using this method will be |
| cryptographically secure. If cryptographic security is not required, |
| <a href="../../../../../org/apache/commons/math3/random/RandomData.html#nextLong(long, long)"><code>RandomData.nextLong(long, long)</code></a> should be used instead of this method.</p> |
| <p> |
| <strong>Definition</strong>: |
| <a href="http://en.wikipedia.org/wiki/Cryptographically_secure_pseudo-random_number_generator"> |
| Secure Random Sequence</a></p></div> |
| <dl> |
| <dt><strong>Specified by:</strong></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/random/RandomData.html#nextSecureLong(long, long)">nextSecureLong</a></code> in interface <code><a href="../../../../../org/apache/commons/math3/random/RandomData.html" title="interface in org.apache.commons.math3.random">RandomData</a></code></dd> |
| <dt><span class="strong">Parameters:</span></dt><dd><code>lower</code> - lower bound for generated integer</dd><dd><code>upper</code> - upper bound for generated integer</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>a random long integer greater than or equal to <code>lower</code> and |
| less than or equal to <code>upper</code>.</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/NumberIsTooLargeException.html" title="class in org.apache.commons.math3.exception">NumberIsTooLargeException</a></code> - if <code>lower >= upper</code>.</dd></dl> |
| </li> |
| </ul> |
| <a name="nextPoisson(double)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>nextPoisson</h4> |
| <pre>public long nextPoisson(double mean) |
| throws <a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a></pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block">Generates a random value from the Poisson distribution with the given |
| mean. |
| <p> |
| <strong>Definition</strong>: |
| <a href="http://www.itl.nist.gov/div898/handbook/eda/section3/eda366j.htm"> |
| Poisson Distribution</a></p> |
| <p> |
| <strong>Algorithm Description</strong>: |
| <ul><li> For small means, uses simulation of a Poisson process |
| using Uniform deviates, as described |
| <a href="http://irmi.epfl.ch/cmos/Pmmi/interactive/rng7.htm"> here.</a> |
| The Poisson process (and hence value returned) is bounded by 1000 * mean.</li> |
| |
| <li> For large means, uses the rejection algorithm described in <br/> |
| Devroye, Luc. (1981).<i>The Computer Generation of Poisson Random Variables</i> |
| <strong>Computing</strong> vol. 26 pp. 197-207.</li></ul></p></div> |
| <dl> |
| <dt><strong>Specified by:</strong></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/random/RandomData.html#nextPoisson(double)">nextPoisson</a></code> in interface <code><a href="../../../../../org/apache/commons/math3/random/RandomData.html" title="interface in org.apache.commons.math3.random">RandomData</a></code></dd> |
| <dt><span class="strong">Parameters:</span></dt><dd><code>mean</code> - the mean of the Poisson distribution</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>a random value following the specified Poisson distribution</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a></code> - if <code>mean <= 0</code>.</dd></dl> |
| </li> |
| </ul> |
| <a name="nextGaussian(double, double)"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>nextGaussian</h4> |
| <pre>public double nextGaussian(double mu, |
| double sigma) |
| throws <a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a></pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block">Generates a random value from the Normal (or Gaussian) distribution with |
| specified mean and standard deviation. |
| <p> |
| <strong>Definition</strong>: |
| <a href="http://www.itl.nist.gov/div898/handbook/eda/section3/eda3661.htm"> |
| Normal Distribution</a></p></div> |
| <dl> |
| <dt><strong>Specified by:</strong></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/random/RandomData.html#nextGaussian(double, double)">nextGaussian</a></code> in interface <code><a href="../../../../../org/apache/commons/math3/random/RandomData.html" title="interface in org.apache.commons.math3.random">RandomData</a></code></dd> |
| <dt><span class="strong">Parameters:</span></dt><dd><code>mu</code> - the mean of the distribution</dd><dd><code>sigma</code> - the standard deviation of the distribution</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>a random value following the specified Gaussian distribution</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a></code> - if <code>sigma <= 0</code>.</dd></dl> |
| </li> |
| </ul> |
| <a name="nextExponential(double)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>nextExponential</h4> |
| <pre>public double nextExponential(double mean) |
| throws <a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a></pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block">Generates a random value from the exponential distribution |
| with specified mean. |
| <p> |
| <strong>Definition</strong>: |
| <a href="http://www.itl.nist.gov/div898/handbook/eda/section3/eda3667.htm"> |
| Exponential Distribution</a></p> |
| |
| <p> |
| <strong>Algorithm Description</strong>: Uses the Algorithm SA (Ahrens) |
| from p. 876 in: |
| [1]: Ahrens, J. H. and Dieter, U. (1972). Computer methods for |
| sampling from the exponential and normal distributions. |
| Communications of the ACM, 15, 873-882. |
| </p></div> |
| <dl> |
| <dt><strong>Specified by:</strong></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/random/RandomData.html#nextExponential(double)">nextExponential</a></code> in interface <code><a href="../../../../../org/apache/commons/math3/random/RandomData.html" title="interface in org.apache.commons.math3.random">RandomData</a></code></dd> |
| <dt><span class="strong">Parameters:</span></dt><dd><code>mean</code> - the mean of the distribution</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>a random value following the specified exponential distribution</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a></code> - if <code>mean <= 0</code>.</dd></dl> |
| </li> |
| </ul> |
| <a name="nextUniform(double, double)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>nextUniform</h4> |
| <pre>public double nextUniform(double lower, |
| double upper) |
| throws <a href="../../../../../org/apache/commons/math3/exception/NumberIsTooLargeException.html" title="class in org.apache.commons.math3.exception">NumberIsTooLargeException</a>, |
| <a href="../../../../../org/apache/commons/math3/exception/NotFiniteNumberException.html" title="class in org.apache.commons.math3.exception">NotFiniteNumberException</a>, |
| <a href="../../../../../org/apache/commons/math3/exception/NotANumberException.html" title="class in org.apache.commons.math3.exception">NotANumberException</a></pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block">Generates a uniformly distributed random value from the open interval |
| <code>(lower, upper)</code> (i.e., endpoints excluded). |
| <p> |
| <strong>Definition</strong>: |
| <a href="http://www.itl.nist.gov/div898/handbook/eda/section3/eda3662.htm"> |
| Uniform Distribution</a> <code>lower</code> and <code>upper - lower</code> are the |
| <a href = "http://www.itl.nist.gov/div898/handbook/eda/section3/eda364.htm"> |
| location and scale parameters</a>, respectively.</p> |
| |
| <p> |
| <strong>Algorithm Description</strong>: scales the output of |
| Random.nextDouble(), but rejects 0 values (i.e., will generate another |
| random double if Random.nextDouble() returns 0). This is necessary to |
| provide a symmetric output interval (both endpoints excluded). |
| </p></div> |
| <dl> |
| <dt><strong>Specified by:</strong></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/random/RandomData.html#nextUniform(double, double)">nextUniform</a></code> in interface <code><a href="../../../../../org/apache/commons/math3/random/RandomData.html" title="interface in org.apache.commons.math3.random">RandomData</a></code></dd> |
| <dt><span class="strong">Parameters:</span></dt><dd><code>lower</code> - the exclusive lower bound of the support</dd><dd><code>upper</code> - the exclusive upper bound of the support</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>a uniformly distributed random value between lower and upper |
| (exclusive)</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/NumberIsTooLargeException.html" title="class in org.apache.commons.math3.exception">NumberIsTooLargeException</a></code> - if <code>lower >= upper</code></dd> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/NotFiniteNumberException.html" title="class in org.apache.commons.math3.exception">NotFiniteNumberException</a></code> - if one of the bounds is infinite</dd> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/NotANumberException.html" title="class in org.apache.commons.math3.exception">NotANumberException</a></code> - if one of the bounds is NaN</dd></dl> |
| </li> |
| </ul> |
| <a name="nextUniform(double, double, boolean)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>nextUniform</h4> |
| <pre>public double nextUniform(double lower, |
| double upper, |
| boolean lowerInclusive) |
| throws <a href="../../../../../org/apache/commons/math3/exception/NumberIsTooLargeException.html" title="class in org.apache.commons.math3.exception">NumberIsTooLargeException</a>, |
| <a href="../../../../../org/apache/commons/math3/exception/NotFiniteNumberException.html" title="class in org.apache.commons.math3.exception">NotFiniteNumberException</a>, |
| <a href="../../../../../org/apache/commons/math3/exception/NotANumberException.html" title="class in org.apache.commons.math3.exception">NotANumberException</a></pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block">Generates a uniformly distributed random value from the interval |
| <code>(lower, upper)</code> or the interval <code>[lower, upper)</code>. The lower |
| bound is thus optionally included, while the upper bound is always |
| excluded. |
| <p> |
| <strong>Definition</strong>: |
| <a href="http://www.itl.nist.gov/div898/handbook/eda/section3/eda3662.htm"> |
| Uniform Distribution</a> <code>lower</code> and <code>upper - lower</code> are the |
| <a href = "http://www.itl.nist.gov/div898/handbook/eda/section3/eda364.htm"> |
| location and scale parameters</a>, respectively.</p> |
| |
| <p> |
| <strong>Algorithm Description</strong>: if the lower bound is excluded, |
| scales the output of Random.nextDouble(), but rejects 0 values (i.e., |
| will generate another random double if Random.nextDouble() returns 0). |
| This is necessary to provide a symmetric output interval (both |
| endpoints excluded). |
| </p></div> |
| <dl> |
| <dt><strong>Specified by:</strong></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/random/RandomData.html#nextUniform(double, double, boolean)">nextUniform</a></code> in interface <code><a href="../../../../../org/apache/commons/math3/random/RandomData.html" title="interface in org.apache.commons.math3.random">RandomData</a></code></dd> |
| <dt><span class="strong">Parameters:</span></dt><dd><code>lower</code> - the lower bound of the support</dd><dd><code>upper</code> - the exclusive upper bound of the support</dd><dd><code>lowerInclusive</code> - <code>true</code> if the lower bound is inclusive</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>uniformly distributed random value in the <code>(lower, upper)</code> |
| interval, if <code>lowerInclusive</code> is <code>false</code>, or in the |
| <code>[lower, upper)</code> interval, if <code>lowerInclusive</code> is |
| <code>true</code></dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/NumberIsTooLargeException.html" title="class in org.apache.commons.math3.exception">NumberIsTooLargeException</a></code> - if <code>lower >= upper</code></dd> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/NotFiniteNumberException.html" title="class in org.apache.commons.math3.exception">NotFiniteNumberException</a></code> - if one of the bounds is infinite</dd> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/NotANumberException.html" title="class in org.apache.commons.math3.exception">NotANumberException</a></code> - if one of the bounds is NaN</dd><dt><span class="strong">Since:</span></dt> |
| <dd>3.0</dd></dl> |
| </li> |
| </ul> |
| <a name="nextBeta(double, double)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>nextBeta</h4> |
| <pre>public double nextBeta(double alpha, |
| double beta)</pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block">Generates a random value from the <a href="../../../../../org/apache/commons/math3/distribution/BetaDistribution.html" title="class in org.apache.commons.math3.distribution"><code>Beta Distribution</code></a>. |
| This implementation uses <a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextInversionDeviate(org.apache.commons.math3.distribution.RealDistribution)"><code>inversion</code></a> |
| to generate random values.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>alpha</code> - first distribution shape parameter</dd><dd><code>beta</code> - second distribution shape parameter</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>random value sampled from the beta(alpha, beta) distribution</dd><dt><span class="strong">Since:</span></dt> |
| <dd>2.2</dd></dl> |
| </li> |
| </ul> |
| <a name="nextBinomial(int, double)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>nextBinomial</h4> |
| <pre>public int nextBinomial(int numberOfTrials, |
| double probabilityOfSuccess)</pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block">Generates a random value from the <a href="../../../../../org/apache/commons/math3/distribution/BinomialDistribution.html" title="class in org.apache.commons.math3.distribution"><code>Binomial Distribution</code></a>. |
| This implementation uses <a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextInversionDeviate(org.apache.commons.math3.distribution.RealDistribution)"><code>inversion</code></a> |
| to generate random values.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>numberOfTrials</code> - number of trials of the Binomial distribution</dd><dd><code>probabilityOfSuccess</code> - probability of success of the Binomial distribution</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>random value sampled from the Binomial(numberOfTrials, probabilityOfSuccess) distribution</dd><dt><span class="strong">Since:</span></dt> |
| <dd>2.2</dd></dl> |
| </li> |
| </ul> |
| <a name="nextCauchy(double, double)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>nextCauchy</h4> |
| <pre>public double nextCauchy(double median, |
| double scale)</pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block">Generates a random value from the <a href="../../../../../org/apache/commons/math3/distribution/CauchyDistribution.html" title="class in org.apache.commons.math3.distribution"><code>Cauchy Distribution</code></a>. |
| This implementation uses <a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextInversionDeviate(org.apache.commons.math3.distribution.RealDistribution)"><code>inversion</code></a> |
| to generate random values.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>median</code> - the median of the Cauchy distribution</dd><dd><code>scale</code> - the scale parameter of the Cauchy distribution</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>random value sampled from the Cauchy(median, scale) distribution</dd><dt><span class="strong">Since:</span></dt> |
| <dd>2.2</dd></dl> |
| </li> |
| </ul> |
| <a name="nextChiSquare(double)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>nextChiSquare</h4> |
| <pre>public double nextChiSquare(double df)</pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block">Generates a random value from the <a href="../../../../../org/apache/commons/math3/distribution/ChiSquaredDistribution.html" title="class in org.apache.commons.math3.distribution"><code>ChiSquare Distribution</code></a>. |
| This implementation uses <a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextInversionDeviate(org.apache.commons.math3.distribution.RealDistribution)"><code>inversion</code></a> |
| to generate random values.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>df</code> - the degrees of freedom of the ChiSquare distribution</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>random value sampled from the ChiSquare(df) distribution</dd><dt><span class="strong">Since:</span></dt> |
| <dd>2.2</dd></dl> |
| </li> |
| </ul> |
| <a name="nextF(double, double)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>nextF</h4> |
| <pre>public double nextF(double numeratorDf, |
| double denominatorDf) |
| throws <a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a></pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block">Generates a random value from the <a href="../../../../../org/apache/commons/math3/distribution/FDistribution.html" title="class in org.apache.commons.math3.distribution"><code>F Distribution</code></a>. |
| This implementation uses <a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextInversionDeviate(org.apache.commons.math3.distribution.RealDistribution)"><code>inversion</code></a> |
| to generate random values.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>numeratorDf</code> - the numerator degrees of freedom of the F distribution</dd><dd><code>denominatorDf</code> - the denominator degrees of freedom of the F distribution</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>random value sampled from the F(numeratorDf, denominatorDf) distribution</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a></code> - if |
| <code>numeratorDf <= 0</code> or <code>denominatorDf <= 0</code>.</dd><dt><span class="strong">Since:</span></dt> |
| <dd>2.2</dd></dl> |
| </li> |
| </ul> |
| <a name="nextGamma(double, double)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>nextGamma</h4> |
| <pre>public double nextGamma(double shape, |
| double scale) |
| throws <a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a></pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block"><p>Generates a random value from the |
| <a href="../../../../../org/apache/commons/math3/distribution/GammaDistribution.html" title="class in org.apache.commons.math3.distribution"><code>Gamma Distribution</code></a>.</p> |
| |
| <p>This implementation uses the following algorithms: </p> |
| |
| <p>For 0 < shape < 1: <br/> |
| Ahrens, J. H. and Dieter, U., <i>Computer methods for |
| sampling from gamma, beta, Poisson and binomial distributions.</i> |
| Computing, 12, 223-246, 1974.</p> |
| |
| <p>For shape >= 1: <br/> |
| Marsaglia and Tsang, <i>A Simple Method for Generating |
| Gamma Variables.</i> ACM Transactions on Mathematical Software, |
| Volume 26 Issue 3, September, 2000.</p></div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>shape</code> - the median of the Gamma distribution</dd><dd><code>scale</code> - the scale parameter of the Gamma distribution</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>random value sampled from the Gamma(shape, scale) distribution</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a></code> - if <code>shape <= 0</code> or |
| <code>scale <= 0</code>.</dd><dt><span class="strong">Since:</span></dt> |
| <dd>2.2</dd></dl> |
| </li> |
| </ul> |
| <a name="nextHypergeometric(int, int, int)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>nextHypergeometric</h4> |
| <pre>public int nextHypergeometric(int populationSize, |
| int numberOfSuccesses, |
| int sampleSize) |
| throws <a href="../../../../../org/apache/commons/math3/exception/NotPositiveException.html" title="class in org.apache.commons.math3.exception">NotPositiveException</a>, |
| <a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a>, |
| <a href="../../../../../org/apache/commons/math3/exception/NumberIsTooLargeException.html" title="class in org.apache.commons.math3.exception">NumberIsTooLargeException</a></pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block">Generates a random value from the <a href="../../../../../org/apache/commons/math3/distribution/HypergeometricDistribution.html" title="class in org.apache.commons.math3.distribution"><code>Hypergeometric Distribution</code></a>. |
| This implementation uses <a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextInversionDeviate(org.apache.commons.math3.distribution.IntegerDistribution)"><code>inversion</code></a> |
| to generate random values.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>populationSize</code> - the population size of the Hypergeometric distribution</dd><dd><code>numberOfSuccesses</code> - number of successes in the population of the Hypergeometric distribution</dd><dd><code>sampleSize</code> - the sample size of the Hypergeometric distribution</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>random value sampled from the Hypergeometric(numberOfSuccesses, sampleSize) distribution</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/NumberIsTooLargeException.html" title="class in org.apache.commons.math3.exception">NumberIsTooLargeException</a></code> - if <code>numberOfSuccesses > populationSize</code>, |
| or <code>sampleSize > populationSize</code>.</dd> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a></code> - if <code>populationSize <= 0</code>.</dd> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/NotPositiveException.html" title="class in org.apache.commons.math3.exception">NotPositiveException</a></code> - if <code>numberOfSuccesses < 0</code>.</dd><dt><span class="strong">Since:</span></dt> |
| <dd>2.2</dd></dl> |
| </li> |
| </ul> |
| <a name="nextPascal(int, double)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>nextPascal</h4> |
| <pre>public int nextPascal(int r, |
| double p) |
| throws <a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a>, |
| <a href="../../../../../org/apache/commons/math3/exception/OutOfRangeException.html" title="class in org.apache.commons.math3.exception">OutOfRangeException</a></pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block">Generates a random value from the <a href="../../../../../org/apache/commons/math3/distribution/PascalDistribution.html" title="class in org.apache.commons.math3.distribution"><code>Pascal Distribution</code></a>. |
| This implementation uses <a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextInversionDeviate(org.apache.commons.math3.distribution.IntegerDistribution)"><code>inversion</code></a> |
| to generate random values.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>r</code> - the number of successes of the Pascal distribution</dd><dd><code>p</code> - the probability of success of the Pascal distribution</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>random value sampled from the Pascal(r, p) distribution</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a></code> - if the number of successes is not positive</dd> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/OutOfRangeException.html" title="class in org.apache.commons.math3.exception">OutOfRangeException</a></code> - if the probability of success is not in the |
| range <code>[0, 1]</code>.</dd><dt><span class="strong">Since:</span></dt> |
| <dd>2.2</dd></dl> |
| </li> |
| </ul> |
| <a name="nextT(double)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>nextT</h4> |
| <pre>public double nextT(double df) |
| throws <a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a></pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block">Generates a random value from the <a href="../../../../../org/apache/commons/math3/distribution/TDistribution.html" title="class in org.apache.commons.math3.distribution"><code>T Distribution</code></a>. |
| This implementation uses <a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextInversionDeviate(org.apache.commons.math3.distribution.RealDistribution)"><code>inversion</code></a> |
| to generate random values.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>df</code> - the degrees of freedom of the T distribution</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>random value from the T(df) distribution</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a></code> - if <code>df <= 0</code></dd><dt><span class="strong">Since:</span></dt> |
| <dd>2.2</dd></dl> |
| </li> |
| </ul> |
| <a name="nextWeibull(double, double)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>nextWeibull</h4> |
| <pre>public double nextWeibull(double shape, |
| double scale) |
| throws <a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a></pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block">Generates a random value from the <a href="../../../../../org/apache/commons/math3/distribution/WeibullDistribution.html" title="class in org.apache.commons.math3.distribution"><code>Weibull Distribution</code></a>. |
| This implementation uses <a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextInversionDeviate(org.apache.commons.math3.distribution.RealDistribution)"><code>inversion</code></a> |
| to generate random values.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>shape</code> - the shape parameter of the Weibull distribution</dd><dd><code>scale</code> - the scale parameter of the Weibull distribution</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>random value sampled from the Weibull(shape, size) distribution</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a></code> - if <code>shape <= 0</code> or |
| <code>scale <= 0</code>.</dd><dt><span class="strong">Since:</span></dt> |
| <dd>2.2</dd></dl> |
| </li> |
| </ul> |
| <a name="nextZipf(int, double)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>nextZipf</h4> |
| <pre>public int nextZipf(int numberOfElements, |
| double exponent) |
| throws <a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a></pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block">Generates a random value from the <a href="../../../../../org/apache/commons/math3/distribution/ZipfDistribution.html" title="class in org.apache.commons.math3.distribution"><code>Zipf Distribution</code></a>. |
| This implementation uses <a href="../../../../../org/apache/commons/math3/random/RandomDataImpl.html#nextInversionDeviate(org.apache.commons.math3.distribution.IntegerDistribution)"><code>inversion</code></a> |
| to generate random values.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>numberOfElements</code> - the number of elements of the ZipfDistribution</dd><dd><code>exponent</code> - the exponent of the ZipfDistribution</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>random value sampled from the Zipf(numberOfElements, exponent) distribution</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a></code> - if <code>numberOfElements <= 0</code> |
| or <code>exponent <= 0</code>.</dd><dt><span class="strong">Since:</span></dt> |
| <dd>2.2</dd></dl> |
| </li> |
| </ul> |
| <a name="reSeed(long)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>reSeed</h4> |
| <pre>public void reSeed(long seed)</pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block">Reseeds the random number generator with the supplied seed. |
| <p> |
| Will create and initialize if null. |
| </p></div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>seed</code> - the seed value to use</dd></dl> |
| </li> |
| </ul> |
| <a name="reSeedSecure()"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>reSeedSecure</h4> |
| <pre>public void reSeedSecure()</pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block">Reseeds the secure random number generator with the current time in |
| milliseconds. |
| <p> |
| Will create and initialize if null. |
| </p></div> |
| </li> |
| </ul> |
| <a name="reSeedSecure(long)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>reSeedSecure</h4> |
| <pre>public void reSeedSecure(long seed)</pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block">Reseeds the secure random number generator with the supplied seed. |
| <p> |
| Will create and initialize if null. |
| </p></div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>seed</code> - the seed value to use</dd></dl> |
| </li> |
| </ul> |
| <a name="reSeed()"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>reSeed</h4> |
| <pre>public void reSeed()</pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block">Reseeds the random number generator with |
| <code>System.currentTimeMillis() + System.identityHashCode(this))</code>.</div> |
| </li> |
| </ul> |
| <a name="setSecureAlgorithm(java.lang.String, java.lang.String)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>setSecureAlgorithm</h4> |
| <pre>public void setSecureAlgorithm(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> algorithm, |
| <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> provider) |
| throws <a href="http://docs.oracle.com/javase/6/docs/api/java/security/NoSuchAlgorithmException.html?is-external=true" title="class or interface in java.security">NoSuchAlgorithmException</a>, |
| <a href="http://docs.oracle.com/javase/6/docs/api/java/security/NoSuchProviderException.html?is-external=true" title="class or interface in java.security">NoSuchProviderException</a></pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block">Sets the PRNG algorithm for the underlying SecureRandom instance using |
| the Security Provider API. The Security Provider API is defined in <a |
| href = |
| "http://java.sun.com/j2se/1.3/docs/guide/security/CryptoSpec.html#AppA"> |
| Java Cryptography Architecture API Specification & Reference.</a> |
| <p> |
| <strong>USAGE NOTE:</strong> This method carries <i>significant</i> |
| overhead and may take several seconds to execute. |
| </p></div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>algorithm</code> - the name of the PRNG algorithm</dd><dd><code>provider</code> - the name of the provider</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="http://docs.oracle.com/javase/6/docs/api/java/security/NoSuchAlgorithmException.html?is-external=true" title="class or interface in java.security">NoSuchAlgorithmException</a></code> - if the specified algorithm is not available</dd> |
| <dd><code><a href="http://docs.oracle.com/javase/6/docs/api/java/security/NoSuchProviderException.html?is-external=true" title="class or interface in java.security">NoSuchProviderException</a></code> - if the specified provider is not installed</dd></dl> |
| </li> |
| </ul> |
| <a name="nextPermutation(int, int)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>nextPermutation</h4> |
| <pre>public int[] nextPermutation(int n, |
| int k) |
| throws <a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a>, |
| <a href="../../../../../org/apache/commons/math3/exception/NumberIsTooLargeException.html" title="class in org.apache.commons.math3.exception">NumberIsTooLargeException</a></pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block">Generates an integer array of length <code>k</code> whose entries are selected |
| randomly, without repetition, from the integers <code>0, ..., n - 1</code> |
| (inclusive). |
| <p> |
| Generated arrays represent permutations of <code>n</code> taken <code>k</code> at a |
| time.</p> |
| |
| <p> |
| Uses a 2-cycle permutation shuffle. The shuffling process is described <a |
| href="http://www.maths.abdn.ac.uk/~igc/tch/mx4002/notes/node83.html"> |
| here</a>. |
| </p></div> |
| <dl> |
| <dt><strong>Specified by:</strong></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/random/RandomData.html#nextPermutation(int, int)">nextPermutation</a></code> in interface <code><a href="../../../../../org/apache/commons/math3/random/RandomData.html" title="interface in org.apache.commons.math3.random">RandomData</a></code></dd> |
| <dt><span class="strong">Parameters:</span></dt><dd><code>n</code> - the domain of the permutation</dd><dd><code>k</code> - the size of the permutation</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>a random <code>k</code>-permutation of <code>n</code>, as an array of |
| integers</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a></code> - if <code>k <= 0</code>.</dd> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/NumberIsTooLargeException.html" title="class in org.apache.commons.math3.exception">NumberIsTooLargeException</a></code> - if <code>k > n</code>.</dd></dl> |
| </li> |
| </ul> |
| <a name="nextSample(java.util.Collection, int)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>nextSample</h4> |
| <pre>public <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>[] nextSample(<a href="http://docs.oracle.com/javase/6/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><?> c, |
| int k) |
| throws <a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a>, |
| <a href="../../../../../org/apache/commons/math3/exception/NumberIsTooLargeException.html" title="class in org.apache.commons.math3.exception">NumberIsTooLargeException</a></pre> |
| <div class="block"><span class="strong">Deprecated.</span> </div> |
| <div class="block">Returns an array of <code>k</code> objects selected randomly from the |
| Collection <code>c</code>. |
| <p> |
| Sampling from <code>c</code> is without replacement; but if <code>c</code> contains |
| identical objects, the sample may include repeats. If all elements of |
| <code>c</code> are distinct, the resulting object array represents a |
| <a href="http://rkb.home.cern.ch/rkb/AN16pp/node250.html#SECTION0002500000000000000000"> |
| Simple Random Sample</a> of size <code>k</code> from the elements of |
| <code>c</code>.</p> |
| |
| <p> |
| <strong>Algorithm Description</strong>: Uses a 2-cycle permutation |
| shuffle to generate a random permutation of <code>c.size()</code> and |
| then returns the elements whose indexes correspond to the elements of the |
| generated permutation. This technique is described, and proven to |
| generate random samples <a |
| href="http://www.maths.abdn.ac.uk/~igc/tch/mx4002/notes/node83.html"> |
| here</a> |
| </p></div> |
| <dl> |
| <dt><strong>Specified by:</strong></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/random/RandomData.html#nextSample(java.util.Collection, int)">nextSample</a></code> in interface <code><a href="../../../../../org/apache/commons/math3/random/RandomData.html" title="interface in org.apache.commons.math3.random">RandomData</a></code></dd> |
| <dt><span class="strong">Parameters:</span></dt><dd><code>c</code> - the collection to be sampled</dd><dd><code>k</code> - the size of the sample</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>a random sample of <code>k</code> elements from <code>c</code></dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/NotStrictlyPositiveException.html" title="class in org.apache.commons.math3.exception">NotStrictlyPositiveException</a></code> - if <code>k <= 0</code>.</dd> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/NumberIsTooLargeException.html" title="class in org.apache.commons.math3.exception">NumberIsTooLargeException</a></code> - if <code>k > c.size()</code>.</dd></dl> |
| </li> |
| </ul> |
| <a name="nextInversionDeviate(org.apache.commons.math3.distribution.RealDistribution)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>nextInversionDeviate</h4> |
| <pre><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a> |
| public double nextInversionDeviate(<a href="../../../../../org/apache/commons/math3/distribution/RealDistribution.html" title="interface in org.apache.commons.math3.distribution">RealDistribution</a> distribution) |
| throws <a href="../../../../../org/apache/commons/math3/exception/MathIllegalArgumentException.html" title="class in org.apache.commons.math3.exception">MathIllegalArgumentException</a></pre> |
| <div class="block"><span class="strong">Deprecated.</span> <i>use the distribution's sample() method</i></div> |
| <div class="block">Generate a random deviate from the given distribution using the |
| <a href="http://en.wikipedia.org/wiki/Inverse_transform_sampling"> inversion method.</a></div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>distribution</code> - Continuous distribution to generate a random value from</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>a random value sampled from the given distribution</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/MathIllegalArgumentException.html" title="class in org.apache.commons.math3.exception">MathIllegalArgumentException</a></code> - if the underlynig distribution throws one</dd><dt><span class="strong">Since:</span></dt> |
| <dd>2.2</dd></dl> |
| </li> |
| </ul> |
| <a name="nextInversionDeviate(org.apache.commons.math3.distribution.IntegerDistribution)"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>nextInversionDeviate</h4> |
| <pre><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a> |
| public int nextInversionDeviate(<a href="../../../../../org/apache/commons/math3/distribution/IntegerDistribution.html" title="interface in org.apache.commons.math3.distribution">IntegerDistribution</a> distribution) |
| throws <a href="../../../../../org/apache/commons/math3/exception/MathIllegalArgumentException.html" title="class in org.apache.commons.math3.exception">MathIllegalArgumentException</a></pre> |
| <div class="block"><span class="strong">Deprecated.</span> <i>use the distribution's sample() method</i></div> |
| <div class="block">Generate a random deviate from the given distribution using the |
| <a href="http://en.wikipedia.org/wiki/Inverse_transform_sampling"> inversion method.</a></div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>distribution</code> - Integer distribution to generate a random value from</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>a random value sampled from the given distribution</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/commons/math3/exception/MathIllegalArgumentException.html" title="class in org.apache.commons.math3.exception">MathIllegalArgumentException</a></code> - if the underlynig distribution throws one</dd><dt><span class="strong">Since:</span></dt> |
| <dd>2.2</dd></dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
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