org.spaceroots.mantissa.quadrature.scalar
Class TrapezoidIntegratorSampler

java.lang.Object
  org.spaceroots.mantissa.quadrature.scalar.TrapezoidIntegratorSampler

All Implemented Interfaces:

SampledFunctionIterator

public class TrapezoidIntegratorSampler

extends Object

implements SampledFunctionIterator

This class implements a trapezoid integrator as a sample.

A trapezoid integrator is a very simple one that assumes the function is constant over the integration step. Since it is very simple, this algorithm needs very small steps to achieve high accuracy, and small steps lead to numerical errors and instabilities.

This algorithm is almost never used and has been included in this package only as a simple template for more useful integrators.

Version:

$Id: TrapezoidIntegratorSampler.java 1237 2002-03-20 21:01:57Z luc $

Author:

L. Maisonobe

See Also:

TrapezoidIntegrator

Constructor Summary

TrapezoidIntegratorSampler(SampledFunctionIterator iter)
Constructor.

Method Summary

boolean	hasNext() Check if the iterator can provide another point.
ScalarValuedPair	nextSamplePoint() Get the next point of a sampled function.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TrapezoidIntegratorSampler

public TrapezoidIntegratorSampler(SampledFunctionIterator iter)
                           throws ExhaustedSampleException,
                                  FunctionException

Constructor. Build an integrator from an underlying sample iterator.

Parameters:

iter - iterator over the base function

Method Detail

hasNext

public boolean hasNext()

Description copied from interface: SampledFunctionIterator

Check if the iterator can provide another point.

Specified by:

hasNext in interface SampledFunctionIterator

Returns:

true if the iterator can provide another point.

nextSamplePoint

public ScalarValuedPair nextSamplePoint()
                                 throws ExhaustedSampleException,
                                        FunctionException

Description copied from interface: SampledFunctionIterator

Get the next point of a sampled function.

Specified by:

nextSamplePoint in interface SampledFunctionIterator

Returns:

the next point of the sampled function

Throws:

FunctionException - if the underlying function throws one

ExhaustedSampleException - if the sample has been exhausted