ASA152
Hypergeometric Probabilities.

ASA152 is a MATLAB program, using double precision arithmetic, which can compute the "point" or "cumulative" probabilities associated with the hypergeometric probability distribution.

ASA152 is Applied Statistics Algorithm 152. Source code for many Applied Statistics Algorithms is available through STATLIB.

Related Data and Programs:

ASA152 is also available in a C++ version and a FORTRAN77 version and a FORTRAN90 version

DCDFLIB is a FORTRAN90 library which evaluates and inverts a number of statistical distributions.

GSL is a C++ library which includes many routines for evaluating probability distributions.

PROB is a MATLAB library which evaluates and inverts a number of probabilistic distributions.

TEST_VALUES is a MATLAB library which contains sample values for a number of distributions.

Reference:

1. PR Freeman,
   Algorithm AS 59: Hypergeometric Probabilities,
   Applied Statistics,
   Volume 22, Number 1, 1973, pages 130-133.
2. Richard Lund,
   Algorithm AS 152: Cumulative hypergeometric probabilities,
   Applied Statistics,
   Volume 29, Number 2, 1980, pages 221-223.
3. BL Shea,
   Remark AS R77: A Remark on Algorithm AS 152: Cumulative hypergeometric probabilities,
   Applied Statistics,
   Volume 38, Number 1, 1989, pages 199-204.

Source Code:

• alnfac.m computes the logarithm of the factorial of N.
• alngam.m computes Log(Gamma(X)).
• alnorm.m computes the cumulative density of the standard normal distribution.
• chyper.m computes point or cumulative hypergeometric probabilities.
• hypergeomeric_cdf_values.m returns some values of the hypergeometric CDF.
• hypergeomeric_pdf_values.m returns some values of the hypergeometric PDF.
• timestamp.m prints out the current YMDHMS date as a timestamp.

Examples and Tests:

• asa152_test.m, a sample calling program.
• asa152_test01.m, tests CHYPER for cumulative probabilities.
• asa152_test02.m, tests CHYPER for point probabilities.
• asa152_test_output.txt, the output file.