Java List Subtract subtract(List a, List b)

Description

Vector subtraction Modifies the first parameter but also returns it for convenience.

License

Open Source License

Parameter

Parameter	Description
a	Vector to subtract from
b	Vector to subtract

Return

Result

Declaration

public static List<Float> subtract(List<Float> a, List<Float> b) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * This file is part of Tmetrics./*from ww w .ja v a  2s  .co  m*/
 *
 * Tmetrics is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Tmetrics is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Tmetrics. If not, see <http://www.gnu.org/licenses/>.
 *******************************************************************************/

import java.util.ArrayList;

import java.util.List;

public class Main {
    /**
     * Vector subtraction
     * 
     * Modifies the first parameter but also returns it for convenience. Vectors
     * must be of same length.
     * 
     * @param a
     *            Vector to subtract from
     * @param b
     *            Vector to subtract
     * @return Result
     */
    public static List<Float> subtract(List<Float> a, List<Float> b) {
        if (a.size() != b.size()) {
            throw new IllegalArgumentException(
                    "Length of vector a (" + a.size() + ") does not equal length of vector b (" + b.size() + ")");
        }
        List<Float> c = new ArrayList<Float>();

        for (int i = 0; i < a.size(); i++) {
            c.add(a.get(i) - b.get(i));
        }
        return c;
    }
}

Related

1. subtract(final List list1, final List list2)
2. subtract(final List list1, final List list2)
3. subtract(final List result, final Object o1, final Object o2)
4. subtract(final String[] input, final String[] list)
5. subtract(List vector, int[] sparseVector)
6. subtract(List a, List b)
7. subtract(List aList, List bList)
8. subtract(String[] list1, String[] list2)