Example: The Akima cubic spline interpolant
A cubic spline interpolant to a function is computed. The value of the spline at point 0.25 is printed.
using System;
using Imsl.Math;
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.Eval(0.25);
Console.Out.WriteLine("The computed cubic spline value at " +
"point .25 is " + csv);
}
}
Output
The computed cubic spline value at point .25 is -0.478185519991867
Link to C# source.