public class GaussIntegrator extends Object
integrating a weighted
function.| Constructor and Description |
|---|
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.
|
| Modifier and Type | Method and Description |
|---|---|
int |
getNumberOfPoints() |
double |
getPoint(int index)
Gets the integration point at the given index.
|
double |
getWeight(int index)
Gets the weight of the integration point at the given index.
|
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. |
public GaussIntegrator(double[] points,
double[] weights)
throws NonMonotonicSequenceException,
DimensionMismatchException
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.DimensionMismatchException - if points and weights don't have the same lengthpublic 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[])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()
public double getPoint(int index)
index - index of the integration pointpublic double getWeight(int index)
index - index of the integration pointCopyright © 2003–2016 The Apache Software Foundation. All rights reserved.