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java.lang.Objectorg.apache.commons.math3.analysis.integration.gauss.GaussIntegratorFactory
public class GaussIntegratorFactory
Class that provides different ways to compute the nodes and weights to be
used by the Gaussian integration rule
.
Field Summary | |
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private BaseRuleFactory<Double> |
legendre
Generator of Gauss-Legendre integrators. |
private BaseRuleFactory<BigDecimal> |
legendreHighPrecision
Generator of Gauss-Legendre integrators. |
Constructor Summary | |
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GaussIntegratorFactory()
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Method Summary | |
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private static Pair<double[],double[]> |
getRule(BaseRuleFactory<? extends Number> factory,
int numberOfPoints)
|
GaussIntegrator |
legendre(int numberOfPoints)
Creates an integrator of the given order, and whose call to the integrate method will perform an integration on the natural interval
[-1 , 1] . |
GaussIntegrator |
legendre(int numberOfPoints,
double lowerBound,
double upperBound)
Creates an integrator of the given order, and whose call to the integrate method will perform an integration on the given interval. |
GaussIntegrator |
legendreHighPrecision(int numberOfPoints)
Creates an integrator of the given order, and whose call to the integrate method will perform an integration on the natural interval
[-1 , 1] . |
GaussIntegrator |
legendreHighPrecision(int numberOfPoints,
double lowerBound,
double upperBound)
Creates an integrator of the given order, and whose call to the integrate method will perform an integration on the given interval. |
private static Pair<double[],double[]> |
transform(Pair<double[],double[]> rule,
double a,
double b)
Performs a change of variable so that the integration can be performed on an arbitrary interval [a, b] . |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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private final BaseRuleFactory<Double> legendre
private final BaseRuleFactory<BigDecimal> legendreHighPrecision
Constructor Detail |
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public GaussIntegratorFactory()
Method Detail |
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public GaussIntegrator legendre(int numberOfPoints)
integrate
method will perform an integration on the natural interval
[-1 , 1]
.
numberOfPoints
- Order of the integration rule.
public GaussIntegrator legendre(int numberOfPoints, double lowerBound, double upperBound)
integrate
method will perform an integration on the given interval.
numberOfPoints
- Order of the integration rule.lowerBound
- Lower bound of the integration interval.upperBound
- Upper bound of the integration interval.
public GaussIntegrator legendreHighPrecision(int numberOfPoints)
integrate
method will perform an integration on the natural interval
[-1 , 1]
.
numberOfPoints
- Order of the integration rule.
public GaussIntegrator legendreHighPrecision(int numberOfPoints, double lowerBound, double upperBound)
integrate
method will perform an integration on the given interval.
numberOfPoints
- Order of the integration rule.lowerBound
- Lower bound of the integration interval.upperBound
- Upper bound of the integration interval.
private static Pair<double[],double[]> getRule(BaseRuleFactory<? extends Number> factory, int numberOfPoints)
factory
- Integration rule factory.numberOfPoints
- Order of the integration rule.
private static Pair<double[],double[]> transform(Pair<double[],double[]> rule, double a, double b)
[a, b]
.
It is assumed that the natural interval is [-1, 1]
.
rule
- Original points and weights.a
- Lower bound of the integration interval.b
- Lower bound of the integration interval.
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