public class SymmetricGaussIntegrator extends GaussIntegrator
integrate
method assuming that the integral is symmetric about 0.
This allows to reduce numerical errors.| Constructor and Description |
|---|
SymmetricGaussIntegrator(double[] points,
double[] weights)
Creates an integrator from the given
points and weights. |
SymmetricGaussIntegrator(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 |
|---|---|
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. |
getNumberOfPoints, getPoint, getWeightpublic SymmetricGaussIntegrator(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 SymmetricGaussIntegrator(Pair<double[],double[]> pointsAndWeights) throws NonMonotonicSequenceException
pointsAndWeights - Integration points and corresponding weights.NonMonotonicSequenceException - if the points are not
sorted in increasing order.SymmetricGaussIntegrator(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.integrate in class GaussIntegratorf - Function to integrate.Copyright © 2003–2016 The Apache Software Foundation. All rights reserved.