ASA063
the Incomplete Beta Function

ASA063 is a FORTRAN90 program, using double precision arithmetic, which evaluates the incomplete Beta function.

ASA063 is Applied Statistics Algorithm 63. Source code for many Applied Statistics Algorithms is available through STATLIB.

Related Data and Programs:

ASA063 is also available in a C++ version and a FORTRAN77 version and a MATLAB version.

ASA109 is a FORTRAN90 library which inverts the incomplete Beta function.

ASA226 is a FORTRAN90 library which evaluates the CDF of the noncentral Beta distribution.

BETA_NC is a FORTRAN90 library which evaluates the CDF of the noncentral Beta distribution.

TEST_VALUES is a FORTRAN90 library which stores a few values of various mathematical functions.

TOMS179 is a FORTRAN90 library which evaluates the incomplete Beta function.

TOMS708 is a FORTRAN90 library which evaluates the incomplete Beta function.

Reference:

1. KL Majumder, GP Bhattacharjee,
   Algorithm AS 63: The incomplete Beta Integral,
   Applied Statistics,
   Volume 22, Number 3, 1973, pages 409-411.

Source Code:

• asa063.f90, the source code.
• asa063.csh, commands to compile the source code.

Examples and Tests:

• asa063_prb.f90, a sample calling program.
• asa063_prb.csh, commands to compile and run the sample program.
• asa063_prb_output.txt, the output file.

List of Routines:

• ALOGAM computes the logarithm of the Gamma function.
• BETA_INC_VALUES returns some values of the incomplete Beta function.
• BETAIN computes the incomplete Beta function ratio.
• TIMESTAMP prints out the current YMDHMS date as a timestamp.

You can go up one level to the FORTRAN90 source codes.