org.hipparchus.analysis.interpolation

Class BilinearInterpolatingFunction

java.lang.Object

org.hipparchus.analysis.interpolation.BilinearInterpolatingFunction

All Implemented Interfaces:

Serializable, BivariateFunction, FieldBivariateFunction

public class BilinearInterpolatingFunction
extends Object
implements BivariateFunction, FieldBivariateFunction, Serializable

Interpolate grid data using bi-linear interpolation.

This interpolator is thread-safe.

Since:

1.4

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
BilinearInterpolatingFunction(double[] xVal, double[] yVal, double[][] fVal) Simple constructor.

Method Summary

Modifier and Type	Method and Description
double	getXInf() Get the lowest grid x coordinate.
double	getXSup() Get the highest grid x coordinate.
double	getYInf() Get the lowest grid y coordinate.
double	getYSup() Get the highest grid y coordinate.
double	value(double x, double y) Compute the value for the function.
<T extends RealFieldElement<T>> T	value(T x, T 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

Methods inherited from interface org.hipparchus.analysis.FieldBivariateFunction

toRealFieldBivariateFunction

Constructor Detail

BilinearInterpolatingFunction

public BilinearInterpolatingFunction(double[] xVal,
                                     double[] yVal,
                                     double[][] fVal)
                              throws MathIllegalArgumentException

Simple constructor.

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]).

Throws:

MathIllegalArgumentException - if grid size is smaller than 2 or if the grid is not sorted in strict increasing order

Method Detail

getXInf

public double getXInf()

Get the lowest grid x coordinate.

Returns:

lowest grid x coordinate

getXSup

public double getXSup()

Get the highest grid x coordinate.

Returns:

highest grid x coordinate

getYInf

public double getYInf()

Get the lowest grid y coordinate.

Returns:

lowest grid y coordinate

getYSup

public double getYSup()

Get the highest grid y coordinate.

Returns:

highest grid y coordinate

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.

value

public <T extends RealFieldElement<T>> T value(T x,
                                               T y)

Compute the value for the function.

Specified by:

value in interface FieldBivariateFunction

Type Parameters:

T - type of the field elements

Parameters:

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

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

Returns:

the value.

Since:

1.5