Java Array Subtract subtract(double[] first, double[] second, double[] out)

Description

Subtracts the values of the first vector from the second vector and puts the result into out.

License

Apache License

Parameter

Parameter	Description
first	the first vector
second	the second vector
out	the output vector, null to create a new one

Return

the out vector

Declaration

public static double[] subtract(double[] first, double[] second, double[] out) 

Method Source Code

//package com.java2s;
/*/*from   www . j a  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 {
    /**
     * Subtracts the values of the first vector from the second vector and puts the result into out.
     * @param first the first vector
     * @param second the second vector
     * @param out the output vector, null to create a new one
     * @return the out vector
     */
    public static double[] subtract(double[] first, double[] second, double[] out) {
        if (out == null) {
            out = new double[first.length];
        }
        if (first.length != second.length || second.length != out.length || first.length != out.length) {
            throw new IllegalArgumentException(
                    "Same size vectors expected: " + first.length + ", " + second.length + ", " + out.length);
        }
        for (int i = 0; i < first.length; i++) {
            out[i] = first[i] - second[i];
        }
        return out;
    }
}

Related

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2. subtract(double[] accumulator, double[] values)
3. subtract(double[] array, double a)
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6. subtract(double[] flowFrom, double[] flowTo)
7. subtract(double[] p1, double[] p2)
8. subtract(double[] res, double[] subtractor)
9. subtract(double[] values, double value)