Java interpolate interpolate(double x, double x1, double y1, double x2, double y2)

Description

Interpolate a value between two points.

License

Open Source License

Parameter

Parameter	Description
x	Value to interpolate
x1	Point 1 (x)
y1	Point 1 (y)
x2	Point 2 (x)
y2	Point 2 (y)

Return

Interpolated value

Declaration

public static double interpolate(double x, double x1, double y1, double x2, double y2) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

public class Main {
    /**/*from ww  w  . jav  a2s .c  o  m*/
     * Interpolate a value between two points.
     * 
     * @param x Value to interpolate
     * @param x1 Point 1 (x)
     * @param y1 Point 1 (y)
     * @param x2 Point 2 (x)
     * @param y2 Point 2 (y)
     * @return Interpolated value
     */
    public static double interpolate(double x, double x1, double y1, double x2, double y2) {
        double alpha = (x - x1) / (x2 - x1);

        return y1 * (1 - alpha) + y2 * alpha;
    }
}

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