org.apache.commons.math3.analysis.interpolation

Class BicubicFunction

java.lang.Object

org.apache.commons.math3.analysis.interpolation.BicubicFunction

All Implemented Interfaces:

BivariateFunction

 class BicubicFunction
extends java.lang.Object
implements BivariateFunction

Bicubic function.

Field Summary

Fields

Modifier and Type	Field and Description
private double[][]	a Coefficients
private static short	N Number of points.

Constructor Summary

Constructors

Constructor and Description
BicubicFunction(double[] coeff) Simple constructor.

Method Summary

Methods

Modifier and Type	Method and Description
private double	apply(double[] pX, double[] pY, double[][] coeff) Compute the value of the bicubic polynomial.
double	value(double x, double y) Compute the value for the function.

Methods inherited from class java.lang.Object

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

Field Detail

N

private static final short N

Number of points.

See Also:

Constant Field Values

a

private final double[][] a

Coefficients

Constructor Detail

BicubicFunction

public BicubicFunction(double[] coeff)

Simple constructor.

Parameters:

coeff - Spline coefficients.

Method Detail

value

public double value(double x,
           double y)

Compute the value for the function.

Specified by:

value in interface BivariateFunction

Parameters:

x - Abscissa for which the function value should be computed.

y - Ordinate for which the function value should be computed.

Returns:

the value.

apply

private double apply(double[] pX,
           double[] pY,
           double[][] coeff)

Compute the value of the bicubic polynomial.

Parameters:

pX - Powers of the x-coordinate.

pY - Powers of the y-coordinate.

coeff - Spline coefficients.

Returns:

the interpolated value.