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<div class="subTitle">org.apache.commons.math3.optim.univariate</div>
<h2 title="Class MultiStartUnivariateOptimizer" class="title">Class MultiStartUnivariateOptimizer</h2>
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<ul class="inheritance">
<li><a href="../../../../../../org/apache/commons/math3/optim/BaseOptimizer.html" title="class in org.apache.commons.math3.optim">org.apache.commons.math3.optim.BaseOptimizer</a>&lt;<a href="../../../../../../org/apache/commons/math3/optim/univariate/UnivariatePointValuePair.html" title="class in org.apache.commons.math3.optim.univariate">UnivariatePointValuePair</a>&gt;</li>
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<ul class="inheritance">
<li><a href="../../../../../../org/apache/commons/math3/optim/univariate/UnivariateOptimizer.html" title="class in org.apache.commons.math3.optim.univariate">org.apache.commons.math3.optim.univariate.UnivariateOptimizer</a></li>
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<li>org.apache.commons.math3.optim.univariate.MultiStartUnivariateOptimizer</li>
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<pre>public class <span class="strong">MultiStartUnivariateOptimizer</span>
extends <a href="../../../../../../org/apache/commons/math3/optim/univariate/UnivariateOptimizer.html" title="class in org.apache.commons.math3.optim.univariate">UnivariateOptimizer</a></pre>
<div class="block">Special implementation of the <a href="../../../../../../org/apache/commons/math3/optim/univariate/UnivariateOptimizer.html" title="class in org.apache.commons.math3.optim.univariate"><code>UnivariateOptimizer</code></a> interface
adding multi-start features to an existing optimizer.
<br/>
This class wraps an optimizer in order to use it several times in
turn with different starting points (trying to avoid being trapped
in a local extremum when looking for a global one).</div>
<dl><dt><span class="strong">Since:</span></dt>
<dd>3.0</dd>
<dt><span class="strong">Version:</span></dt>
<dd>$Id: MultiStartUnivariateOptimizer.java 1435539 2013-01-19 13:27:24Z tn $</dd></dl>
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<h3>Fields inherited from class&nbsp;org.apache.commons.math3.optim.<a href="../../../../../../org/apache/commons/math3/optim/BaseOptimizer.html" title="class in org.apache.commons.math3.optim">BaseOptimizer</a></h3>
<code><a href="../../../../../../org/apache/commons/math3/optim/BaseOptimizer.html#evaluations">evaluations</a>, <a href="../../../../../../org/apache/commons/math3/optim/BaseOptimizer.html#iterations">iterations</a></code></li>
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<caption><span>Constructors</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colOne" scope="col">Constructor and Description</th>
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<tr class="altColor">
<td class="colOne"><code><strong><a href="../../../../../../org/apache/commons/math3/optim/univariate/MultiStartUnivariateOptimizer.html#MultiStartUnivariateOptimizer(org.apache.commons.math3.optim.univariate.UnivariateOptimizer, int, org.apache.commons.math3.random.RandomGenerator)">MultiStartUnivariateOptimizer</a></strong>(<a href="../../../../../../org/apache/commons/math3/optim/univariate/UnivariateOptimizer.html" title="class in org.apache.commons.math3.optim.univariate">UnivariateOptimizer</a>&nbsp;optimizer,
int&nbsp;starts,
<a href="../../../../../../org/apache/commons/math3/random/RandomGenerator.html" title="interface in org.apache.commons.math3.random">RandomGenerator</a>&nbsp;generator)</code>
<div class="block">Create a multi-start optimizer from a single-start optimizer.</div>
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<caption><span>Methods</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<td class="colFirst"><code>protected <a href="../../../../../../org/apache/commons/math3/optim/univariate/UnivariatePointValuePair.html" title="class in org.apache.commons.math3.optim.univariate">UnivariatePointValuePair</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optim/univariate/MultiStartUnivariateOptimizer.html#doOptimize()">doOptimize</a></strong>()</code>
<div class="block">Performs the bulk of the optimization algorithm.</div>
</td>
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<tr class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optim/univariate/MultiStartUnivariateOptimizer.html#getEvaluations()">getEvaluations</a></strong>()</code>
<div class="block">Gets the number of evaluations of the objective function.</div>
</td>
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<tr class="altColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/commons/math3/optim/univariate/UnivariatePointValuePair.html" title="class in org.apache.commons.math3.optim.univariate">UnivariatePointValuePair</a>[]</code></td>
<td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optim/univariate/MultiStartUnivariateOptimizer.html#getOptima()">getOptima</a></strong>()</code>
<div class="block">Gets all the optima found during the last call to <code>optimize</code>.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/commons/math3/optim/univariate/UnivariatePointValuePair.html" title="class in org.apache.commons.math3.optim.univariate">UnivariatePointValuePair</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../../org/apache/commons/math3/optim/univariate/MultiStartUnivariateOptimizer.html#optimize(org.apache.commons.math3.optim.OptimizationData...)">optimize</a></strong>(<a href="../../../../../../org/apache/commons/math3/optim/OptimizationData.html" title="interface in org.apache.commons.math3.optim">OptimizationData</a>...&nbsp;optData)</code>
<div class="block">Stores data and performs the optimization.</div>
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<h3>Methods inherited from class&nbsp;org.apache.commons.math3.optim.univariate.<a href="../../../../../../org/apache/commons/math3/optim/univariate/UnivariateOptimizer.html" title="class in org.apache.commons.math3.optim.univariate">UnivariateOptimizer</a></h3>
<code><a href="../../../../../../org/apache/commons/math3/optim/univariate/UnivariateOptimizer.html#computeObjectiveValue(double)">computeObjectiveValue</a>, <a href="../../../../../../org/apache/commons/math3/optim/univariate/UnivariateOptimizer.html#getGoalType()">getGoalType</a>, <a href="../../../../../../org/apache/commons/math3/optim/univariate/UnivariateOptimizer.html#getMax()">getMax</a>, <a href="../../../../../../org/apache/commons/math3/optim/univariate/UnivariateOptimizer.html#getMin()">getMin</a>, <a href="../../../../../../org/apache/commons/math3/optim/univariate/UnivariateOptimizer.html#getStartValue()">getStartValue</a>, <a href="../../../../../../org/apache/commons/math3/optim/univariate/UnivariateOptimizer.html#parseOptimizationData(org.apache.commons.math3.optim.OptimizationData...)">parseOptimizationData</a></code></li>
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<h3>Methods inherited from class&nbsp;org.apache.commons.math3.optim.<a href="../../../../../../org/apache/commons/math3/optim/BaseOptimizer.html" title="class in org.apache.commons.math3.optim">BaseOptimizer</a></h3>
<code><a href="../../../../../../org/apache/commons/math3/optim/BaseOptimizer.html#getConvergenceChecker()">getConvergenceChecker</a>, <a href="../../../../../../org/apache/commons/math3/optim/BaseOptimizer.html#getIterations()">getIterations</a>, <a href="../../../../../../org/apache/commons/math3/optim/BaseOptimizer.html#getMaxEvaluations()">getMaxEvaluations</a>, <a href="../../../../../../org/apache/commons/math3/optim/BaseOptimizer.html#getMaxIterations()">getMaxIterations</a>, <a href="../../../../../../org/apache/commons/math3/optim/BaseOptimizer.html#incrementEvaluationCount()">incrementEvaluationCount</a>, <a href="../../../../../../org/apache/commons/math3/optim/BaseOptimizer.html#incrementIterationCount()">incrementIterationCount</a>, <a href="../../../../../../org/apache/commons/math3/optim/BaseOptimizer.html#optimize()">optimize</a></code></li>
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<h3>Methods inherited from class&nbsp;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>
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<h3>Constructor Detail</h3>
<a name="MultiStartUnivariateOptimizer(org.apache.commons.math3.optim.univariate.UnivariateOptimizer, int, org.apache.commons.math3.random.RandomGenerator)">
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<h4>MultiStartUnivariateOptimizer</h4>
<pre>public&nbsp;MultiStartUnivariateOptimizer(<a href="../../../../../../org/apache/commons/math3/optim/univariate/UnivariateOptimizer.html" title="class in org.apache.commons.math3.optim.univariate">UnivariateOptimizer</a>&nbsp;optimizer,
int&nbsp;starts,
<a href="../../../../../../org/apache/commons/math3/random/RandomGenerator.html" title="interface in org.apache.commons.math3.random">RandomGenerator</a>&nbsp;generator)</pre>
<div class="block">Create a multi-start optimizer from a single-start optimizer.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>optimizer</code> - Single-start optimizer to wrap.</dd><dd><code>starts</code> - Number of starts to perform. If <code>starts == 1</code>,
the <code>optimize</code> methods will return the same solution as
<code>optimizer</code> would.</dd><dd><code>generator</code> - Random generator to use for restarts.</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>starts &lt; 1</code>.</dd></dl>
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<h3>Method Detail</h3>
<a name="getEvaluations()">
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<h4>getEvaluations</h4>
<pre>public&nbsp;int&nbsp;getEvaluations()</pre>
<div class="block">Gets the number of evaluations of the objective function.
The number of evaluations corresponds to the last call to the
<code>optimize</code> method. It is 0 if the method has not been
called yet.</div>
<dl>
<dt><strong>Overrides:</strong></dt>
<dd><code><a href="../../../../../../org/apache/commons/math3/optim/BaseOptimizer.html#getEvaluations()">getEvaluations</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/commons/math3/optim/BaseOptimizer.html" title="class in org.apache.commons.math3.optim">BaseOptimizer</a>&lt;<a href="../../../../../../org/apache/commons/math3/optim/univariate/UnivariatePointValuePair.html" title="class in org.apache.commons.math3.optim.univariate">UnivariatePointValuePair</a>&gt;</code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the number of evaluations of the objective function.</dd></dl>
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<a name="getOptima()">
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<h4>getOptima</h4>
<pre>public&nbsp;<a href="../../../../../../org/apache/commons/math3/optim/univariate/UnivariatePointValuePair.html" title="class in org.apache.commons.math3.optim.univariate">UnivariatePointValuePair</a>[]&nbsp;getOptima()</pre>
<div class="block">Gets all the optima found during the last call to <code>optimize</code>.
The optimizer stores all the optima found during a set of
restarts. The <code>optimize</code> method returns the best point only.
This method returns all the points found at the end of each starts,
including the best one already returned by the <code>optimize</code> method.
<br/>
The returned array as one element for each start as specified
in the constructor. It is ordered with the results from the
runs that did converge first, sorted from best to worst
objective value (i.e in ascending order if minimizing and in
descending order if maximizing), followed by <code>null</code> elements
corresponding to the runs that did not converge. This means all
elements will be <code>null</code> if the <code>optimize</code> method did throw
an exception.
This also means that if the first element is not <code>null</code>, it is
the best point found across all starts.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>an array containing the optima.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="../../../../../../org/apache/commons/math3/exception/MathIllegalStateException.html" title="class in org.apache.commons.math3.exception">MathIllegalStateException</a></code> - if <a href="../../../../../../org/apache/commons/math3/optim/univariate/MultiStartUnivariateOptimizer.html#optimize(org.apache.commons.math3.optim.OptimizationData...)"><code>optimize</code></a> has not been called.</dd></dl>
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<h4>optimize</h4>
<pre>public&nbsp;<a href="../../../../../../org/apache/commons/math3/optim/univariate/UnivariatePointValuePair.html" title="class in org.apache.commons.math3.optim.univariate">UnivariatePointValuePair</a>&nbsp;optimize(<a href="../../../../../../org/apache/commons/math3/optim/OptimizationData.html" title="interface in org.apache.commons.math3.optim">OptimizationData</a>...&nbsp;optData)</pre>
<div class="block">Stores data and performs the optimization.
<p>
The list of parameters is open-ended so that sub-classes can extend it
with arguments specific to their concrete implementations.
<p>
When the method is called multiple times, instance data is overwritten
only when actually present in the list of arguments: when not specified,
data set in a previous call is retained (and thus is optional in
subsequent calls).
<p>
Important note: Subclasses <em>must</em> override
<a href="../../../../../../org/apache/commons/math3/optim/BaseOptimizer.html#parseOptimizationData(org.apache.commons.math3.optim.OptimizationData...)"><code>BaseOptimizer.parseOptimizationData(OptimizationData[])</code></a> if they need to register
their own options; but then, they <em>must</em> also call
<code>super.parseOptimizationData(optData)</code> within that method.</div>
<dl>
<dt><strong>Overrides:</strong></dt>
<dd><code><a href="../../../../../../org/apache/commons/math3/optim/univariate/UnivariateOptimizer.html#optimize(org.apache.commons.math3.optim.OptimizationData...)">optimize</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/commons/math3/optim/univariate/UnivariateOptimizer.html" title="class in org.apache.commons.math3.optim.univariate">UnivariateOptimizer</a></code></dd>
<dt><span class="strong">Parameters:</span></dt><dd><code>optData</code> - Optimization data. In addition to those documented in
<a href="../../../../../../org/apache/commons/math3/optim/BaseOptimizer.html#parseOptimizationData(org.apache.commons.math3.optim.OptimizationData...)"><code>BaseOptimizer</code></a>, this method will register the following data:
<ul>
<li><a href="../../../../../../org/apache/commons/math3/optim/nonlinear/scalar/GoalType.html" title="enum in org.apache.commons.math3.optim.nonlinear.scalar"><code>GoalType</code></a></li>
<li><a href="../../../../../../org/apache/commons/math3/optim/univariate/SearchInterval.html" title="class in org.apache.commons.math3.optim.univariate"><code>SearchInterval</code></a></li>
<li><a href="../../../../../../org/apache/commons/math3/optim/univariate/UnivariateObjectiveFunction.html" title="class in org.apache.commons.math3.optim.univariate"><code>UnivariateObjectiveFunction</code></a></li>
</ul></dd>
<dt><span class="strong">Returns:</span></dt><dd>a point/value pair that satisfies the convergence criteria.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="../../../../../../org/apache/commons/math3/exception/MathIllegalStateException.html" title="class in org.apache.commons.math3.exception">MathIllegalStateException</a></code> - if <code>optData</code> does not contain an
instance of <a href="../../../../../../org/apache/commons/math3/optim/MaxEval.html" title="class in org.apache.commons.math3.optim"><code>MaxEval</code></a> or <a href="../../../../../../org/apache/commons/math3/optim/univariate/SearchInterval.html" title="class in org.apache.commons.math3.optim.univariate"><code>SearchInterval</code></a>.</dd></dl>
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<h4>doOptimize</h4>
<pre>protected&nbsp;<a href="../../../../../../org/apache/commons/math3/optim/univariate/UnivariatePointValuePair.html" title="class in org.apache.commons.math3.optim.univariate">UnivariatePointValuePair</a>&nbsp;doOptimize()</pre>
<div class="block">Performs the bulk of the optimization algorithm.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../../../../../org/apache/commons/math3/optim/BaseOptimizer.html#doOptimize()">doOptimize</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/commons/math3/optim/BaseOptimizer.html" title="class in org.apache.commons.math3.optim">BaseOptimizer</a>&lt;<a href="../../../../../../org/apache/commons/math3/optim/univariate/UnivariatePointValuePair.html" title="class in org.apache.commons.math3.optim.univariate">UnivariatePointValuePair</a>&gt;</code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the point/value pair giving the optimal value of the
objective function.</dd></dl>
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