Java Array Difference differenceFunction(float[] data, int windowLength)

Description

difference Function

License

Open Source License

Declaration

public static float[] differenceFunction(float[] data, int windowLength) 

Method Source Code

//package com.java2s;
/*//www .j  a v  a2s. co  m
 * Copyright (c) 2008-2013 Maksim Khadkevich and Fondazione Bruno Kessler.
 *
 * This file is part of MART.
 * MART is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2, as published
 * by the Free Software Foundation.
 *
 * MART 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 MART; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

public class Main {
    public static float[] differenceFunction(float[] data, int windowLength) {
        float[] diffFunction = new float[data.length];
        float sum;
        for (int t = 0; t < data.length; t++) {
            sum = 0;
            for (int j = 0; j < Math.min(j + windowLength, data.length - t); j++) {
                sum += Math.pow(data[j] - data[j + t], 2);
            }
            diffFunction[t] = sum;
        }
        return diffFunction;
    }

    public static float[] pow(float[] inData, float rate) {
        float[] out = new float[inData.length];
        for (int i = 0; i < inData.length; i++) {
            out[i] = (float) Math.pow(inData[i], rate);
        }
        return out;
    }
}

Related

1. difference(float[] v1, float[] v2)
2. difference2D(char[][] first, char[][] second)
3. difference5D(char[][][][][] first, char[][][][][] second)