org.apache.commons.math.analysis.interpolation

Class TricubicSplineInterpolatingFunction

java.lang.Object

org.apache.commons.math.analysis.interpolation.TricubicSplineInterpolatingFunction

All Implemented Interfaces:

TrivariateRealFunction

public class TricubicSplineInterpolatingFunction
extends java.lang.Object
implements TrivariateRealFunction

Function that implements the tricubic spline interpolation, as proposed in Tricubic interpolation in three dimensions
F. Lekien and J. Marsden
Int. J. Numer. Meth. Engng 2005; 63:455-471

Since:

2.2

Constructor Summary

Constructors

Constructor and Description
TricubicSplineInterpolatingFunction(double[] x, double[] y, double[] z, double[][][] f, double[][][] dFdX, double[][][] dFdY, double[][][] dFdZ, double[][][] d2FdXdY, double[][][] d2FdXdZ, double[][][] d2FdYdZ, double[][][] d3FdXdYdZ)

Method Summary

Modifier and Type	Method and Description
double	value(double x, double y, double z) Compute the value for the function.

Methods inherited from class java.lang.Object

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

Constructor Detail

TricubicSplineInterpolatingFunction

public TricubicSplineInterpolatingFunction(double[] x,
                                           double[] y,
                                           double[] z,
                                           double[][][] f,
                                           double[][][] dFdX,
                                           double[][][] dFdY,
                                           double[][][] dFdZ,
                                           double[][][] d2FdXdY,
                                           double[][][] d2FdXdZ,
                                           double[][][] d2FdYdZ,
                                           double[][][] d3FdXdYdZ)

Parameters:

x - Sample values of the x-coordinate, in increasing order.

y - Sample values of the y-coordinate, in increasing order.

z - Sample values of the y-coordinate, in increasing order.

f - Values of the function on every grid point.

dFdX - Values of the partial derivative of function with respect to x on every grid point.

dFdY - Values of the partial derivative of function with respect to y on every grid point.

dFdZ - Values of the partial derivative of function with respect to z on every grid point.

d2FdXdY - Values of the cross partial derivative of function on every grid point.

d2FdXdZ - Values of the cross partial derivative of function on every grid point.

d2FdYdZ - Values of the cross partial derivative of function on every grid point.

d3FdXdYdZ - Values of the cross partial derivative of function on every grid point.

Throws:

NoDataException - if any of the arrays has zero length.

DimensionMismatchException - if the various arrays do not contain the expected number of elements.

java.lang.IllegalArgumentException - if x, y or z are not strictly increasing.

Method Detail

value

public double value(double x,
                    double y,
                    double z)

Compute the value for the function.

Specified by:

value in interface TrivariateRealFunction

Parameters:

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

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

z - z-coordinate for which the function value should be computed.

Returns:

the value.