package com.imsl.test.example.math;

import com.imsl.math.*;

/**
 * <p>
 * Computes the Akima cubic spline.</p>
 *
 * An Akima cubic spline interpolant to a function is computed. The value of the
 * spline at point 0.25 is printed.
 *
 * @see <a href="CsAkimaEx1.java">Code</a>
 * @see <a href="doc-files/CsAkimaEx1.out">Output</a>
 *
 */
public class CsAkimaEx1 {

    public static void main(String args[]) {
        int n = 11;
        double x[] = new double[n];
        double y[] = new double[n];

        for (int k = 0; k < n; k++) {
            x[k] = (double) k / (double) (n - 1);
            y[k] = Math.sin(15.0 * x[k]);
        }

        CsAkima cs = new CsAkima(x, y);
        double csv = cs.value(0.25);
        System.out.println("The computed cubic spline value at point .25 is "
                + csv);
    }
}