Linearly remaps the values in an array to fit within the specified interval. - Java java.lang

Java examples for java.lang:Math Array Function

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Description

Linearly remaps the values in an array to fit within the specified interval.

Demo Code

/**//from   w ww .j  a v a  2 s  .c o  m
 * Java Modular Image Synthesis Toolkit (JMIST)
 * Copyright (C) 2008-2013 Bradley W. Kimmel
 *
 * 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.
 */
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;

public class Main{
    /**
     * Linearly remaps the values in an array to fit within the specified
     * interval.
     * @param x The array of doubles to remap.
     * @param min The value to remap the minimum value of <code>x</code> to.
     * @param max The value to remap the maximum value of <code>x</code> to.
     * @return A reference to <code>x</code>.
     */
    public static double[] remap(double[] x, double min, double max) {
        double xmin = Double.POSITIVE_INFINITY;
        double xmax = Double.NEGATIVE_INFINITY;

        for (int i = 0; i < x.length; i++) {
            if (x[i] < xmin) {
                xmin = x[i];
            }
            if (x[i] > xmax) {
                xmax = x[i];
            }
        }

        double xrange = xmax - xmin;
        double range = max - min;

        for (int i = 0; i < x.length; i++) {
            x[i] = min + range * ((x[i] - xmin) / xrange);
        }

        return x;
    }
    /**
     * Linearly remaps the values in an array to fit within the specified
     * interval.
     * @param x The array of doubles to remap.
     * @param I The <code>Interval</code> to remap <code>x</code> to.
     * @return A reference to <code>x</code>.
     */
    public static double[] remap(double[] x, Interval I) {
        return remap(x, I.minimum(), I.maximum());
    }
    /**
     * Linearly remaps the values in an array to fit within the interval
     * <code>[0,1]</code>.
     * @param x The array of doubles to remap.
     * @return A reference to <code>x</code>.
     */
    public static double[] remap(double[] x) {
        return remap(x, 0.0, 1.0);
    }
}

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