org.apache.commons.math.analysis.interpolation

Class SmoothingPolynomialBicubicSplineInterpolator

java.lang.Object

org.apache.commons.math.analysis.interpolation.BicubicSplineInterpolator

org.apache.commons.math.analysis.interpolation.SmoothingPolynomialBicubicSplineInterpolator

All Implemented Interfaces:

BivariateRealGridInterpolator

public class SmoothingPolynomialBicubicSplineInterpolator
extends BicubicSplineInterpolator

Generates a bicubic interpolation function. Prior to generating the interpolating function, the input is smoothed using polynomial fitting.

Since:

2.2

Constructor Summary

Constructors

Constructor and Description
SmoothingPolynomialBicubicSplineInterpolator() Default constructor.
SmoothingPolynomialBicubicSplineInterpolator(int degree)
SmoothingPolynomialBicubicSplineInterpolator(int xDegree, int yDegree)

Method Summary

Modifier and Type	Method and Description
BicubicSplineInterpolatingFunction	interpolate(double[] xval, double[] yval, double[][] fval) Computes an interpolating function for the data set.

Methods inherited from class java.lang.Object

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

Constructor Detail

SmoothingPolynomialBicubicSplineInterpolator

public SmoothingPolynomialBicubicSplineInterpolator()

Default constructor. The degree of the fitting polynomials is set to 3.

SmoothingPolynomialBicubicSplineInterpolator

public SmoothingPolynomialBicubicSplineInterpolator(int degree)

Parameters:

degree - Degree of the polynomial fitting functions.

SmoothingPolynomialBicubicSplineInterpolator

public SmoothingPolynomialBicubicSplineInterpolator(int xDegree,
                                                    int yDegree)

Parameters:

xDegree - Degree of the polynomial fitting functions along the x-dimension.

yDegree - Degree of the polynomial fitting functions along the y-dimension.

Method Detail

interpolate

public BicubicSplineInterpolatingFunction interpolate(double[] xval,
                                                      double[] yval,
                                                      double[][] fval)
                                               throws MathException

Computes an interpolating function for the data set.

Specified by:

interpolate in interface BivariateRealGridInterpolator

Overrides:

interpolate in class BicubicSplineInterpolator

Parameters:

xval - All the x-coordinates of the interpolation points, sorted in increasing order.

yval - All the y-coordinates of the interpolation points, sorted in increasing order.

fval - The values of the interpolation points on all the grid knots: fval[i][j] = f(xval[i], yval[j]).

Returns:

a function which interpolates the data set.

Throws:

MathException - if arguments violate assumptions made by the interpolation algorithm.