GaussIntegratorFactory
org.apache.commons.math3.analysis.integration.gauss

Class GaussIntegratorFactory



  • public class GaussIntegratorFactoryextends Object
    Class that provides different ways to compute the nodes and weights to be used by the Gaussian integration rule.
    • Constructor Detail

      • GaussIntegratorFactory

        public GaussIntegratorFactory()
    • Method Detail

      • legendre

        public GaussIntegrator legendre(int numberOfPoints)
        Creates a Gauss-Legendre integrator of the given order. The call to the integrate method will perform an integration on the natural interval [-1 , 1].
        Parameters:
        numberOfPoints - Order of the integration rule.
        Returns:
        a Gauss-Legendre integrator.
      • legendre

        public GaussIntegrator legendre(int numberOfPoints,                       double lowerBound,                       double upperBound)                         throws NotStrictlyPositiveException
        Creates a Gauss-Legendre integrator of the given order. The call to the integrate method will perform an integration on the given interval.
        Parameters:
        numberOfPoints - Order of the integration rule.
        lowerBound - Lower bound of the integration interval.
        upperBound - Upper bound of the integration interval.
        Returns:
        a Gauss-Legendre integrator.
        Throws:
        NotStrictlyPositiveException - if number of points is not positive
      • legendreHighPrecision

        public GaussIntegrator legendreHighPrecision(int numberOfPoints)                                      throws NotStrictlyPositiveException
        Creates a Gauss-Legendre integrator of the given order. The call to the integrate method will perform an integration on the natural interval [-1 , 1].
        Parameters:
        numberOfPoints - Order of the integration rule.
        Returns:
        a Gauss-Legendre integrator.
        Throws:
        NotStrictlyPositiveException - if number of points is not positive
      • legendreHighPrecision

        public GaussIntegrator legendreHighPrecision(int numberOfPoints,                                    double lowerBound,                                    double upperBound)                                      throws NotStrictlyPositiveException
        Creates an integrator of the given order, and whose call to the integrate method will perform an integration on the given interval.
        Parameters:
        numberOfPoints - Order of the integration rule.
        lowerBound - Lower bound of the integration interval.
        upperBound - Upper bound of the integration interval.
        Returns:
        a Gauss-Legendre integrator.
        Throws:
        NotStrictlyPositiveException - if number of points is not positive
      • hermite

        public SymmetricGaussIntegrator hermite(int numberOfPoints)
        Creates a Gauss-Hermite integrator of the given order. The call to the integrate method will perform a weighted integration on the interval [-&inf;, +&inf;]: the computed value is the improper integral of e-x2 f(x) where f(x) is the function passed to the integrate method.
        Parameters:
        numberOfPoints - Order of the integration rule.
        Returns:
        a Gauss-Hermite integrator.

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