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java.lang.Objectorg.apache.commons.math3.analysis.integration.gauss.GaussIntegrator
public class GaussIntegrator
Class that implements the Gaussian rule for
integrating a weighted
function.
| Constructor Summary | |
|---|---|
GaussIntegrator(double[] points,
double[] weights)
Creates an integrator from the given points and weights. |
|
GaussIntegrator(Pair<double[],double[]> pointsAndWeights)
Creates an integrator from the given pair of points (first element of the pair) and weights (second element of the pair. |
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| Method Summary | |
|---|---|
int |
getNumberOfPoints()
|
double |
integrate(UnivariateFunction f)
Returns an estimate of the integral of f(x) * w(x),
where w is a weight function that depends on the actual
flavor of the Gauss integration scheme. |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
|---|
public GaussIntegrator(double[] points,
double[] weights)
throws NonMonotonicSequenceException
points and weights.
The integration interval is defined by the first and last value of
points which must be sorted in increasing order.
points - Integration points.weights - Weights of the corresponding integration nodes.
NonMonotonicSequenceException - if the points are not
sorted in increasing order.
public GaussIntegrator(Pair<double[],double[]> pointsAndWeights)
throws NonMonotonicSequenceException
pointsAndWeights - Integration points and corresponding weights.
NonMonotonicSequenceException - if the points are not
sorted in increasing order.GaussIntegrator(double[], double[])| Method Detail |
|---|
public double integrate(UnivariateFunction f)
f(x) * w(x),
where w is a weight function that depends on the actual
flavor of the Gauss integration scheme.
The algorithm uses the points and associated weights, as passed
to the constructor.
f - Function to integrate.
public int getNumberOfPoints()
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