COMPUTATIONS--Subroutine Library for Prime Computers In Reply Refer To: January 26, 1984 EGS-Mail Stop 415 SURFACE WATER BRANCH TECHNICAL MEMORANDUM NO. 84.06 Subject: COMPUTATIONS--Subroutine Library for Prime Computers The attached report "Computer Routines for Probability Distributions, Random Numbers, and Related Functions," Water-Resources Investigations Report No. 83-4257, by W. Kirby, describes a collection of subroutines that can be used to expedite the development of Fortran programs that perform probability or statistical calculations or Monte Carlo simulations. The collection includes routines for calculating the normal, Student t, F, Pearson Type III, Gumbel, Weibull, Gamma, and Beta distributions, routines for generating uniform or normal quasi-random numbers, and routines for making linear or normal-probability plots on a line printer. This report is a revision of Open-File Report No. 80-884, same title, distributed with Surface Water Branch Technical Memorandum No. 80.06, June 3, 1980. As the report states, these routines are operational on the Amdahl computer RE1 and on the Northeastern Region Prime computer (RVARES) in Reston. In addition, they are available on the National Node Prime computer (QVARSA). To use any of the routines on these computers, simply call the routines in your own Fortran program as specified in the report and supply the name of the subroutine library in any of the standard procedures for running Fortran programs. It is not necessary to retrieve and recompile the Fortran subrou- tine code on these computers. For use on other computers, the Fortran source code for both the Amdahl and Prime versions is available for printing or punching on the Amdahl RE1 computers. Please bring this report to the attention of personnel on your staff who write computer programs for statistical analyses of hydrologic data. Marshall E. Moss Chief, Surface Water Branch Attachment Distribution: A, B, FOL, PL "This memorandum supersedes SWB Technical Memorandum No. 80.06."