TOMS344
Student's T-Distribution

TOMS344 is a FORTRAN77 library which implements ACM TOMS algorithm 344, for evaluating Student's T distribution.

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.html.

Usage:

call ttest ( t, df, ans, kerr )

where T is the argument, DF is the (integer) number of degrees of freedom, ANS is output as the value of Student's T distribution, and KERR is an error code which is 0 for successful computation.

Languages:

TOMS344 is available in a FORTRAN77 version.

Related Data and Programs:

DCDFLIB, a FORTRAN90 library which evaluates many statistical distributions.

PROB, a FORTRAN90 library which evaluates many statistical distributions.

TEST_VALUES, a FORTRAN77 library which includes selected tabulated values of many mathematical functions.

Reference:

1. David Levine,
   Algorithm 344: Student's T-Distribution,
   Communications of the ACM,
   Volume 11, Number 1, pages 37-38, January 1969.

Source Code:

• toms344.f, the source code.
• toms344.sh, commands to compile the source code.

Examples and Tests:

• toms344_prb.f, a sample calling program.
• toms344_prb.sh, commands to compile and run the sample program.
• toms344_prb_output.txt, the output from a run of the sample program.

List of Routines:

• TTEST evaluates Student's T-distribution.

You can go up one level to the FORTRAN77 source codes.