org.spaceroots.mantissa.functions.scalar
Interface SampledFunction

All Superinterfaces:

Serializable

All Known Implementing Classes:

ComputableFunctionSampler

public interface SampledFunction

extends Serializable

This interface represent sampled scalar functions.

A function sample is an ordered set of points of the form (x, y) where x is the abscissa of the point and y is the function value at x. It is typically a function that has been computed by external means or the result of measurements.

The ComputableFunctionSampler class can be used to transform classes implementing the ComputableFunction interface into classes implementing this interface.

Sampled functions cannot be directly handled by integrators implementing the SampledFunctionIntegrator. These integrators need a SampledFunctionIterator object to iterate over the sample.

Version:

$Id: SampledFunction.java 1709 2006-12-03 21:16:50Z luc $

Author:

L. Maisonobe

See Also:

SampledFunctionIterator, ComputableFunctionSampler, ComputableFunction

Method Summary

ScalarValuedPair	samplePointAt(int index) Get the abscissa and value of the sample at the specified index.
int	size() Get the number of points in the sample.

Method Detail

size

public int size()

Get the number of points in the sample.

Returns:

number of points in the sample

samplePointAt

public ScalarValuedPair samplePointAt(int index)
                               throws ArrayIndexOutOfBoundsException,
                                      FunctionException

Get the abscissa and value of the sample at the specified index.

Parameters:

index - index in the sample, should be between 0 and size() - 1

Returns:

abscissa and value of the sample at the specified index

Throws:

ArrayIndexOutOfBoundsException - if the index is wrong

FunctionException - if an eventual underlying function throws one