quadrature_golub_welsch

quadrature_golub_welsch, a C code which illustrates the use of the Golub Welsch technique for computing the points and weights of a Gaussian quadrature rule.

Licensing:

The computer code and data files described and made available on this web page are distributed under the MIT license

Languages:

quadrature_golub_welsch is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version.

Related Data and Programs:

CLENSHAW_CURTIS_RULE, a C code which defines a Clenshaw Curtis quadrature rule.

quadrature_golub_welsch_test

QUADRATURE_LEAST_SQUARES, a C code which computes weights for "sub-interpolatory" quadrature rules, that is, it estimates integrals by integrating a polynomial that approximates the function data in a least squares sense.

QUADRATURE_WEIGHTS_VANDERMONDE, a C code which determines the weights of a quadrature rule using the Vandermonde matrix.

QUADRULE, a C code which defines quadrature rules for 1-dimensional domains.

TOMS655, a C code which computes the weights for interpolatory quadrature rule;
this library is commonly called IQPACK;
this is a C version of ACM TOMS algorithm 655.

Reference:

1. Philip Davis, Philip Rabinowitz,
   Methods of Numerical Integration,
   Second Edition,
   Dover, 2007,
   ISBN: 0486453391,
   LC: QA299.3.D28.
2. Sylvan Elhay, Jaroslav Kautsky,
   Algorithm 655: IQPACK, FORTRAN Subroutines for the Weights of Interpolatory Quadrature,
   ACM Transactions on Mathematical Software,
   Volume 13, Number 4, December 1987, pages 399-415.
3. Jaroslav Kautsky, Sylvan Elhay,
   Calculation of the Weights of Interpolatory Quadratures,
   Numerische Mathematik,
   Volume 40, 1982, pages 407-422.

Source Code:

• quadrature_golub_welsch.c, the source code.
• quadrature_golub_welsch.sh, compiles the source code.
• quadrature_golub_welsch.h, the include file.