Java Matrix Sum sumSpecificIndices(double[] input, int[][] indices, int columnInIndices)

Description

sum Specific Indices

License

Open Source License

Declaration

public static double sumSpecificIndices(double[] input, int[][] indices, int columnInIndices) 

Method Source Code

//package com.java2s;
/*/*from  w ww .j  a  va 2 s.c  om*/
 *  Java Information Dynamics Toolkit (JIDT)
 *  Copyright (C) 2012, Joseph T. Lizier
 *  
 *  This program 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.
 *  
 *  This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */

public class Main {
    public static double sumSpecificIndices(double[] input, int[] indices) {
        double total = 0;
        for (int i = 0; i < indices.length; i++) {
            total += input[indices[i]];
        }
        return total;
    }

    public static double sumSpecificIndices(double[] input, int[][] indices, int columnInIndices) {
        double total = 0;
        for (int i = 0; i < indices.length; i++) {
            total += input[indices[i][columnInIndices]];
        }
        return total;
    }

    public static double sumSpecificIndices(double[] input, int[][] indices, int columnInIndices,
            int indicesOffset) {
        double total = 0;
        for (int i = 0; i < indices.length; i++) {
            total += input[indices[i][columnInIndices] + indicesOffset];
        }
        return total;
    }
}

Related

1. sumMetrix(double[][] total, double[][] element)
2. sumOfMatrixElements(double[][] m)
3. sumRow(int[][] matrix, int u)
4. sumRow(int[][] table, int column)
5. sums(double[][] input)
6. sumSq(float[][] arr)