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| <h2 title="Class ComplexUtils" class="title">Class ComplexUtils</h2> |
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| <pre>public class <span class="strong">ComplexUtils</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></pre> |
| <div class="block">Static implementations of common |
| <a href="../../../../../org/apache/commons/math3/complex/Complex.html" title="class in org.apache.commons.math3.complex"><code>Complex</code></a> utilities functions.</div> |
| <dl><dt><span class="strong">Version:</span></dt> |
| <dd>$Id: ComplexUtils.java 1416643 2012-12-03 19:37:14Z tn $</dd></dl> |
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| <td class="colFirst"><code>static <a href="../../../../../org/apache/commons/math3/complex/Complex.html" title="class in org.apache.commons.math3.complex">Complex</a>[]</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/complex/ComplexUtils.html#convertToComplex(double[])">convertToComplex</a></strong>(double[] real)</code> |
| <div class="block">Convert an array of primitive doubles to an array of <code>Complex</code> objects.</div> |
| </td> |
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| <td class="colFirst"><code>static <a href="../../../../../org/apache/commons/math3/complex/Complex.html" title="class in org.apache.commons.math3.complex">Complex</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../../org/apache/commons/math3/complex/ComplexUtils.html#polar2Complex(double, double)">polar2Complex</a></strong>(double r, |
| double theta)</code> |
| <div class="block">Creates a complex number from the given polar representation.</div> |
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| <h4>polar2Complex</h4> |
| <pre>public static <a href="../../../../../org/apache/commons/math3/complex/Complex.html" title="class in org.apache.commons.math3.complex">Complex</a> polar2Complex(double r, |
| double theta) |
| throws <a href="../../../../../org/apache/commons/math3/exception/MathIllegalArgumentException.html" title="class in org.apache.commons.math3.exception">MathIllegalArgumentException</a></pre> |
| <div class="block">Creates a complex number from the given polar representation. |
| <p> |
| The value returned is <code>r·e<sup>i·theta</sup></code>, |
| computed as <code>r·cos(theta) + r·sin(theta)i</code></p> |
| <p> |
| If either <code>r</code> or <code>theta</code> is NaN, or |
| <code>theta</code> is infinite, <a href="../../../../../org/apache/commons/math3/complex/Complex.html#NaN"><code>Complex.NaN</code></a> is returned.</p> |
| <p> |
| If <code>r</code> is infinite and <code>theta</code> is finite, |
| infinite or NaN values may be returned in parts of the result, following |
| the rules for double arithmetic.<pre> |
| Examples: |
| <code> |
| polar2Complex(INFINITY, π/4) = INFINITY + INFINITY i |
| polar2Complex(INFINITY, 0) = INFINITY + NaN i |
| polar2Complex(INFINITY, -π/4) = INFINITY - INFINITY i |
| polar2Complex(INFINITY, 5π/4) = -INFINITY - INFINITY i </code></pre></p></div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>r</code> - the modulus of the complex number to create</dd><dd><code>theta</code> - the argument of the complex number to create</dd> |
| <dt><span class="strong">Returns:</span></dt><dd><code>r·e<sup>i·theta</sup></code></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 <code>r</code> is negative.</dd><dt><span class="strong">Since:</span></dt> |
| <dd>1.1</dd></dl> |
| </li> |
| </ul> |
| <a name="convertToComplex(double[])"> |
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| <h4>convertToComplex</h4> |
| <pre>public static <a href="../../../../../org/apache/commons/math3/complex/Complex.html" title="class in org.apache.commons.math3.complex">Complex</a>[] convertToComplex(double[] real)</pre> |
| <div class="block">Convert an array of primitive doubles to an array of <code>Complex</code> objects.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>real</code> - Array of numbers to be converted to their <code>Complex</code> |
| equivalent.</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>an array of <code>Complex</code> objects.</dd><dt><span class="strong">Since:</span></dt> |
| <dd>3.1</dd></dl> |
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