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## org.apache.commons.math.analysis.interpolation
Class BicubicSplineInterpolatingFunction

    java.lang.Object
      org.apache.commons.math.analysis.interpolation.BicubicSplineInterpolatingFunction

All Implemented Interfaces:
  BivariateRealFunction

    public class BicubicSplineInterpolatingFunction

extends Object
implements BivariateRealFunction

Function that implements the bicubic spline interpolation.

Since:
  2.1
Version:
  $Revision$ $Date$

Constructor Summary
`BicubicSplineInterpolatingFunction(double[] x, double[] y, double[][] f, double[][] dFdX, double[][] dFdY, double[][] d2FdXdY)`

Method Summary
`double` | `partialDerivativeX(double x, double y)`
`double` | `partialDerivativeXX(double x, double y)`
`double` | `partialDerivativeXY(double x, double y)`
`double` | `partialDerivativeY(double x, double y)`
`double` | `partialDerivativeYY(double x, double y)`
`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`

Constructor Detail

### BicubicSplineInterpolatingFunction

    public BicubicSplineInterpolatingFunction(double[] x,
                                              double[] y,
                                              double[][] f,
                                              double[][] dFdX,
                                              double[][] dFdY,
                                              double[][] d2FdXdY)
                                       throws DimensionMismatchException

Parameters:
  `x` - Sample values of the x-coordinate, in increasing order.
  `y` - 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.
  `d2FdXdY` - Values of the cross partial derivative of function on every grid point.
Throws:
  `DimensionMismatchException` - if the various arrays do not contain the expected number of elements.
  `NonMonotonousSequenceException` - if `x` or `y` are not strictly increasing.
  `NoDataException` - if any of the arrays has zero length.

Method Detail

### value

    public double value(double x,
                        double y)

  Compute the value for the function.

  Specified by:
    `value` in interface `BivariateRealFunction`
  Parameters:
    `x` - Abscissa for which the function value should be computed.
    `y` - Ordinate for which the function value should be computed.
  Returns:
    the value.

### partialDerivativeX

    public double partialDerivativeX(double x,
                                     double y)

  Parameters:
    `x` - x-coordinate.
    `y` - y-coordinate.
  Returns:
    the value at point (x, y) of the first partial derivative with respect to x.
  Since:
    2.2

### partialDerivativeY

    public double partialDerivativeY(double x,
                                     double y)

  Parameters:
    `x` - x-coordinate.
    `y` - y-coordinate.
  Returns:
    the value at point (x, y) of the first partial derivative with respect to y.
  Since:
    2.2

### partialDerivativeXX

    public double partialDerivativeXX(double x,
                                      double y)

  Parameters:
    `x` - x-coordinate.
    `y` - y-coordinate.
  Returns:
    the value at point (x, y) of the second partial derivative with respect to x.
  Since:
    2.2

### partialDerivativeYY

    public double partialDerivativeYY(double x,
                                      double y)

  Parameters:
    `x` - x-coordinate.
    `y` - y-coordinate.
  Returns:
    the value at point (x, y) of the second partial derivative with respect to y.
  Since:
    2.2

### partialDerivativeXY

    public double partialDerivativeXY(double x,
                                      double y)

  Parameters:
    `x` - x-coordinate.
    `y` - y-coordinate.
  Returns:
    the value at point (x, y) of the second partial cross-derivative.
  Since:
    2.2

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