Are there some implementations of random distributions, such as
poisson,normal, erlang, weibull, binomial, chi-square,
^^^^^^
Normal distributions are supported by SLIB; info appended. If you
have formulas for the other distributions, please send and I will
incorporate them.
hypergeometric,... available for guile+slib? I couldn't find
anything the like in the scheme repository. If not, would it be
better to write them directly in scheme or to use C/C++- written
ones (e.g. those in libg++) and wrap them into libguile?
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File: slib.info, Node: Random Numbers, Next: Cyclic Checksum, Prev: Prime Factorization, Up: Mathematical Packages
Random Numbers
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`(require 'random)'
....
If inexact numbers are support by the Scheme implementation,
`randinex.scm' will be loaded as well. `randinex.scm' contains
procedures for generating inexact distributions.
- Procedure: random:normal
- Procedure: random:normal STATE
Returns an inexact real in a normal distribution with mean 0 and
standard deviation 1. For a normal distribution with mean M and
standard deviation D use `(+ M (* D (random:normal)))'.
- Procedure: random:normal-vector! VECT
- Procedure: random:normal-vector! VECT STATE
Fills VECT with inexact real random numbers which are independent
and standard normally distributed (i.e., with mean 0 and variance
1).
- Procedure: random:exp
- Procedure: random:exp STATE
Returns an inexact real in an exponential distribution with mean
1. For an exponential distribution with mean U use (* U
(random:exp)).
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