Class LegendreRuleFactory
java.lang.Object
org.hipparchus.analysis.integration.gauss.AbstractRuleFactory
org.hipparchus.analysis.integration.gauss.LegendreRuleFactory
- All Implemented Interfaces:
RuleFactory
Factory that creates Gauss-type quadrature rule using Legendre polynomials.
In this implementation, the lower and upper bounds of the natural interval
of integration are -1 and 1, respectively.
The Legendre polynomials are evaluated using the recurrence relation
presented in
Abramowitz and Stegun, 1964.
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Constructor Summary
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Method Summary
Modifier and TypeMethodDescriptionprotected Pair<double[],
double[]> computeRule
(int numberOfPoints) Computes the rule for the given order.Methods inherited from class org.hipparchus.analysis.integration.gauss.AbstractRuleFactory
enforceSymmetry, findRoots, getRule
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Constructor Details
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LegendreRuleFactory
public LegendreRuleFactory()Empty constructor.This constructor is not strictly necessary, but it prevents spurious javadoc warnings with JDK 18 and later.
- Since:
- 3.0
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Method Details
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computeRule
protected Pair<double[],double[]> computeRule(int numberOfPoints) throws MathIllegalArgumentException Computes the rule for the given order.- Specified by:
computeRule
in classAbstractRuleFactory
- Parameters:
numberOfPoints
- Order of the rule to be computed.- Returns:
- the computed rule.
- Throws:
MathIllegalArgumentException
- if the elements of the pair do not have the same length.
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