ASA183
Wichman-Hill Random Number Generator (RNG)

ASA183 is a C library which implements a random number generator (RNG), by Wichman and Hill.

ASA183 is Applied Statistics Algorithm 183. Source code for many Applied Statistics Algorithms is available through STATLIB.

Licensing:

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

Languages:

ASA183 is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version and a Python version.

Related Data and Programs:

C_RANDOM, C programs which illustrate the use of C's random number generator routines.

NORMAL, a C library which computes elements of a sequence of pseudorandom normally distributed values.

RANLIB, a C library which produces random samples from Probability Density Functions (PDF's), including Beta, Chi-square Exponential, F, Gamma, Multivariate normal, Noncentral chi-square, Noncentral F, Univariate normal, random permutations, Real uniform, Binomial, Negative Binomial, Multinomial, Poisson and Integer uniform, by Barry Brown and James Lovato.

RNGLIB, a C library which implements a random number generator (RNG) with splitting facilities, allowing multiple independent streams to be computed, by L'Ecuyer and Cote.

UNIFORM, a C library which computes elements of a sequence of pseudorandom uniformly distributed values.

VAN_DER_CORPUT, a C library which computes elements of a 1D van der Corput Quasi Monte Carlo (QMC) sequence using a simple interface.

Author:

Original FORTRAN77 version by Brian Wichman and David Hill; C version by John Burkardt.

Reference:

1. Pierre LEcuyer,
   Efficient and Portable Combined Random Number Generators,
   Communications of the ACM,
   Volume 31, Number 6, June 1988, pages 742-751.
2. Brian Wichmann, David Hill,
   Algorithm AS 183: An Efficient and Portable Pseudo-random Number Generator,
   Applied Statistics,
   Volume 31, Number 2, 1982, pages 188-190.

Source Code:

• asa183.c, the source code.
• asa183.h, the include file.

Examples and Tests:

• asa183_test.c, a sample calling program.
• asa183_test.txt, the output file.

List of Routines:

• R4_RANDOM returns a pseudorandom number between 0 and 1.
• R4_UNI returns a pseudorandom number between 0 and 1.
• R8_RANDOM returns a pseudorandom number between 0 and 1.
• R8_UNI returns a pseudorandom number between 0 and 1.
• TIMESTAMP prints out the current YMDHMS date as a timestamp.

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