public class GaussIntegrator extends Object
integrating a weighted
 function.| Constructor and Description | 
|---|
| GaussIntegrator(double[] points,
               double[] weights)Creates an integrator from the given  pointsandweights. | 
| 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),
 wherewis 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.