Java Linear Interpolate linearInterpolate(double[] x)

Description

linear Interpolate

License

Open Source License

Declaration

public static double[] linearInterpolate(double[] x) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2014, 2015 IBM Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.//from   w  w  w  .ja v  a 2  s  . com
 *******************************************************************************/

public class Main {
    public static double[] linearInterpolate(double[] x) {
        int n = x.length;
        double[] intered = new double[n];
        for (int i = 0; i < n; i++) {
            intered[i] = x[i];
        }

        double ref = x[0];
        int idx_ref = 0;
        double incre = 0;
        for (int i = 0; i < n; i++) {
            double current = x[i];
            if (current > ref) {
                double diff = current - ref;
                int dc = i - idx_ref;
                incre = diff / ((double) dc);
                for (int j = idx_ref; j < i; j++) {
                    intered[j] = intered[j] + incre * (double) (j - idx_ref);
                }
                ref = x[i];
                idx_ref = i;
            }
        }
        for (int i = idx_ref; i < n; i++) {
            intered[i] = intered[i] + incre * (double) (i - idx_ref);
        }

        return intered;

    }
}

Related

1. LinearInterp(double n0, double n1, double a)
2. linearInterp(double xa, double ya, double xb, double yb, double x)
3. linearInterp(long firstPoint, long lastPoint, int numValues, long currentPoint)
4. linearInterpolate(double v0, double v1, double t)
5. linearInterpolate(double v1, double v2, double amount)
6. linearInterpolate(float y1, float y2, float mu)
7. linearInterpolation(double min, double max, double factor)
8. linearInterpolation(double x, double x1, double x2, double y1, double y2)
9. linearInterpolation(double x0, double y0, double x1, double y1, double x)