laguerre_rule, a C++ code which generates a specific Gauss-Laguerre quadrature rule, based on user input.
The rule is written to three files for easy use as input to other programs.
The Gauss-Laguerre quadrature rule is used as follows:
Integral ( a <= x < +oo ) exp ( - b * ( x - a ) ) f(x) dxis to be approximated by
Sum ( 1 <= i <= order ) w(i) * f(x(i))
laguerre_rule order a b filenamewhere
The computer code and data files described and made available on this web page are distributed under the MIT license
laguerre_rule is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version.
CCN_RULE, a C++ code which defines a nested Clenshaw Curtis quadrature rule.
CHEBYSHEV1_RULE, a C++ code which can compute and print a Gauss-Chebyshev type 1 quadrature rule.
CHEBYSHEV2_RULE, a C++ code which can compute and print a Gauss-Chebyshev type 2 quadrature rule.
CLENSHAW_CURTIS_RULE, a C++ code which defines a Clenshaw Curtis quadrature rule.
GEGENBAUER_RULE, a C++ code which can compute and print a Gauss-Gegenbauer quadrature rule.
GEN_HERMITE_RULE, a C++ code which can compute and print a generalized Gauss-Hermite quadrature rule.
GEN_LAGUERRE_RULE, a C++ code which can compute and print a generalized Gauss-Laguerre quadrature rule.
HERMITE_RULE, a C++ code which can compute and print a Gauss-Hermite quadrature rule.
JACOBI_RULE, a C++ code which can compute and print a Gauss-Jacobi quadrature rule.
LAGUERRE_POLYNOMIAL, a C++ code which evaluates the Laguerre polynomial, the generalized Laguerre polynomial, and the Laguerre function.
laguerre_integrands, a C++ code which defines test integrands for integration over [A,+oo).
LEGENDRE_RULE, a C++ code which computes a Gauss-Legendre quadrature rule.
LINE_FELIPPA_RULE, a C++ code which returns the points and weights of a Felippa quadrature rule over the interior of a line segment in 1D.
PATTERSON_RULE, a C++ code which computes a Gauss-Patterson quadrature rule.
QUADRATURE_RULES, a dataset directory which contains sets of files that define quadrature rules over various 1D intervals or multidimensional hypercubes.
QUADRATURE_RULES_LAGUERRE, a dataset directory which contains triples of files defining standard Laguerre quadrature rules.
TRUNCATED_NORMAL_RULE, a C++ code which computes a quadrature rule for a normal probability density function (PDF), also called a Gaussian distribution, that has been truncated to [A,+oo), (-oo,B] or [A,B].