org.spaceroots.mantissa.quadrature.scalar
Class RiemannIntegrator

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

All Implemented Interfaces:

SampledFunctionIntegrator

public class RiemannIntegrator

extends Object

implements SampledFunctionIntegrator

This class implements a Riemann integrator.

A Riemann 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: RiemannIntegrator.java 1237 2002-03-20 21:01:57Z luc $

Author:

L. Maisonobe

See Also:

TrapezoidIntegrator

Constructor Summary

RiemannIntegrator()

Method Summary

double

integrate(SampledFunctionIterator iter) Integrate a sample over its overall range

Methods inherited from class java.lang.Object

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

Constructor Detail

RiemannIntegrator

public RiemannIntegrator()

Method Detail

integrate

public double integrate(SampledFunctionIterator iter)
                 throws ExhaustedSampleException,
                        FunctionException

Description copied from interface: SampledFunctionIntegrator

Integrate a sample over its overall range

Specified by:

integrate in interface SampledFunctionIntegrator

Parameters:

iter - iterator over the sample to integrate

Returns:

value of the integral over the sample range

Throws:

FunctionException - if the underlying sampled function throws one

ExhaustedSampleException - if the sample does not have enough points for the integration scheme