Package org.apache.commons.math3.analysis.interpolation

Class UnivariatePeriodicInterpolator

java.lang.Object

org.apache.commons.math3.analysis.interpolation.UnivariatePeriodicInterpolator

All Implemented Interfaces:

UnivariateInterpolator

public class UnivariatePeriodicInterpolator
extends Object
implements UnivariateInterpolator

Adapter for classes implementing the UnivariateInterpolator interface. The data to be interpolated is assumed to be periodic. Thus values that are outside of the range can be passed to the interpolation function: They will be wrapped into the initial range before being passed to the class that actually computes the interpolation.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	DEFAULT_EXTEND	Default number of extension points of the samples array.

Constructor Summary

Constructors

Constructor	Description
UnivariatePeriodicInterpolator(UnivariateInterpolator interpolator, double period)	Builds an interpolator.
UnivariatePeriodicInterpolator(UnivariateInterpolator interpolator, double period, int extend)	Builds an interpolator.

Method Summary

Modifier and Type	Method	Description
UnivariateFunction	interpolate(double[] xval, double[] yval)	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

Field Details

DEFAULT_EXTEND

public static final int DEFAULT_EXTEND

Default number of extension points of the samples array.

See Also:

• Constant Field Values

Constructor Details

UnivariatePeriodicInterpolator

public UnivariatePeriodicInterpolator(UnivariateInterpolator interpolator,
 double period,
 int extend)

Builds an interpolator.

Parameters:

interpolator - Interpolator.

period - Period.

extend - Number of points to be appended at the beginning and end of the sample arrays in order to avoid interpolation failure at the (periodic) boundaries of the orginal interval. The value is the number of sample points which the original interpolator needs on each side of the interpolated point.

UnivariatePeriodicInterpolator

public UnivariatePeriodicInterpolator(UnivariateInterpolator interpolator,
 double period)

Builds an interpolator. Uses DEFAULT_EXTEND as the number of extension points on each side of the original abscissae range.

Parameters:

interpolator - Interpolator.

period - Period.

Method Details

interpolate

public UnivariateFunction interpolate(double[] xval,
 double[] yval)
                               throws NumberIsTooSmallException,
NonMonotonicSequenceException

Compute an interpolating function for the dataset.

Specified by:

interpolate in interface UnivariateInterpolator

Parameters:

xval - Arguments for the interpolation points.

yval - Values for the interpolation points.

Returns:

a function which interpolates the dataset.

Throws:

NumberIsTooSmallException - if the number of extension points is larger than the size of xval.

NonMonotonicSequenceException