BicubicInterpolator (Hipparchus 3.0 API)

java.lang.Object
- org.hipparchus.analysis.interpolation.BicubicInterpolator

All Implemented Interfaces:

BivariateGridInterpolator
```
public class BicubicInterpolator
extends Object
implements BivariateGridInterpolator
```
Generates a bicubic interpolating function.
Caveat: Because the interpolation scheme requires that derivatives be specified at the sample points, those are approximated with finite differences (using the 2-points symmetric formulae). Since their values are undefined at the borders of the provided interpolation ranges, the interpolated values will be wrong at the edges of the patch. The interpolate method will return a function that overrides BicubicInterpolatingFunction.isValidPoint(double,double) to indicate points where the interpolation will be inaccurate.

Constructor Summary

Constructors
Constructor Description

BicubicInterpolator()
Empty constructor.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`BicubicInterpolatingFunction`	`interpolate(double[] xval, double[] yval, double[][] fval)`	Compute an interpolating function for the dataset.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - BicubicInterpolator
```
public BicubicInterpolator()
```
    Empty constructor.
    This constructor is not strictly necessary, but it prevents spurious javadoc warnings with JDK 18 and later.
    
    Since:
    
    3.0
- Method Detail
  - interpolate
```
public BicubicInterpolatingFunction interpolate(double[] xval,
                                                double[] yval,
                                                double[][] fval)
                                         throws MathIllegalArgumentException
```
    Compute an interpolating function for the dataset.
    
    Specified by:
    
    interpolate in interface BivariateGridInterpolator
    
    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 dataset.
    
    Throws:
    
    MathIllegalArgumentException - if any of the arrays has zero length.