Java Square square(double[] in, double[] out)

Description

Squares each element of the input vector and puts it into the out vector.

License

Apache License

Parameter

Parameter	Description
in	the input vector
out	the output vector, null to create a new one

Return

the out vector

Declaration

public static double[] square(double[] in, double[] out) 

Method Source Code

//package com.java2s;
/*/*from  w  w  w.ja  v a 2  s. co m*/
 * Copyright 2012-2014 David Karnok
 *
 * Licensed 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.
 */

public class Main {
    /**
     * Squares each element of the input vector and puts it into the out vector.
     * @param in the input vector
     * @param out the output vector, null to create a new one
     * @return the out vector
     */
    public static double[] square(double[] in, double[] out) {
        if (out == null) {
            out = new double[in.length];
        }
        if (in.length != out.length) {
            throw new IllegalArgumentException("in.length != out.length: " + in.length + " vs. " + out.length);
        }
        for (int i = 0; i < in.length; i++) {
            double a = in[i];
            out[i] = a * a;
        }
        return out;
    }
}

Related

1. square(double a)
2. square(double[][] m)
3. square(final double num)
4. square(float number, int power)
5. square(int n)