org.opensourcephysics.numerics
Class Interpolation

java.lang.Object
  org.opensourcephysics.numerics.Interpolation

public class Interpolation
extends java.lang.Object

Class Interpolation defines simple interpolation algorithms. This class cannot be subclassed or instantiated because all methods are static.

Author:

Wolfgang Christian

Method Summary

static double	lagrange(double x, double[] xd, double[] yd) Lagrange polynomial interpolation at a single point x.
static double	linear(double x, double x0, double x1, double y0, double y1) Linear interpolation at a single point x.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

linear

public static double linear(double x,
                            double x0,
                            double x1,
                            double y0,
                            double y1)

Linear interpolation at a single point x.

Parameters:

x - double

x0 - double

x1 - double

y0 - double

y1 - double

Returns:

double

lagrange

public static double lagrange(double x,
                              double[] xd,
                              double[] yd)

Lagrange polynomial interpolation at a single point x. Because Lagrange polynomials tend to be ill behaved, this method should be used with care. A LagrangeInterpolator object should be used if multiple interpolations are to be performed using the same data.

Parameters:

x - double

xd - double[] the x data

yd - double[] the y data

Returns:

double