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Java example source code file (ComplexUtils.java)
The ComplexUtils.java Java example source code/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.apache.commons.math3.complex; import org.apache.commons.math3.exception.MathIllegalArgumentException; import org.apache.commons.math3.exception.util.LocalizedFormats; import org.apache.commons.math3.util.FastMath; /** * Static implementations of common * {@link org.apache.commons.math3.complex.Complex} utilities functions. * */ public class ComplexUtils { /** * Default constructor. */ private ComplexUtils() {} /** * Creates a complex number from the given polar representation. * <p> * The value returned is <code>r·ei·theta, * computed as <code>r·cos(theta) + r·sin(theta)i * <p> * If either <code>r or* * @param r the modulus of the complex number to create * @param theta the argument of the complex number to create * @return <code>r·ei·theta * @throws MathIllegalArgumentException if {@code r} is negative. * @since 1.1 */ public static Complex polar2Complex(double r, double theta) throws MathIllegalArgumentException { if (r < 0) { throw new MathIllegalArgumentException( LocalizedFormats.NEGATIVE_COMPLEX_MODULE, r); } return new Complex(r * FastMath.cos(theta), r * FastMath.sin(theta)); } /** * Convert an array of primitive doubles to an array of {@code Complex} objects. * * @param real Array of numbers to be converted to their {@code Complex} * equivalent. * @return an array of {@code Complex} objects. * * @since 3.1 */ public static Complex[] convertToComplex(double[] real) { final Complex c[] = new Complex[real.length]; for (int i = 0; i < real.length; i++) { c[i] = new Complex(real[i], 0); } return c; } } Other Java examples (source code examples)Here is a short list of links related to this Java ComplexUtils.java source code file: |
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