jburkardt

TOMS291\ Approximate Log(Gamma(X)) {#toms291-approximate-loggammax align=”center”} =========================

---

TOMS291 is a C++ program which approximates the logarithm of the Gamma function.

The text of many ACM TOMS algorithms is available online through ACM: http://www.acm.org/pubs/calgo or NETLIB: http://www.netlib.org/toms/index.md.

Licensing: {#licensing align=”center”}

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

Languages: {#languages align=”center”}

TOMS291 is available in a C version and a C++ version and a FORTRAN77 version and a FORTRAN90 version and a MATLAB version.

Related Data and Programs: {#related-data-and-programs align=”center”}

ASA245, a C++ library which evaluates the logarithm of the Gamma function.

GSL, a C++ library which evaluates many special functions, including the logarithm of the Gamma function.

POLPAK, a C++ library which evaluates a variety of special functions.

SPECFUN, a FORTRAN77 library which evaluates a variety of special functions.

TEST_VALUES, a C++ library which tabulates several values of a variety of special functions.

TOMS708, a FORTRAN90 library which evaluates several special functions, including the logarithm of the Gamma function.

Reference: {#reference align=”center”}

1. Malcolm Pike, David Hill,\ Algorithm 291: Logarithm of Gamma Function,\ Communications of the ACM,\ Volume 9, Number 9, September 1966, page 684.

Source Code: {#source-code align=”center”}

• toms291.cpp, the source code.
• toms291.hpp, the include file.

Examples and Tests: {#examples-and-tests align=”center”}

• toms291_prb.cpp, a sample calling program.
• toms291_prb_output.txt, the output file.

List of Routines: {#list-of-routines align=”center”}

• ALOGAM computes the logarithm of the Gamma function.
• GAMMA_LOG_VALUES returns some values of the Log Gamma function.
• TIMESTAMP prints out the current YMDHMS date as a timestamp.

You can go up one level to the C++ source codes.

---

Last revised on 22 January 2008.