XLISP-STAT has several functions for generating pseudo-random numbers. For example, the expression

(uniform-rand 50)will generate a list of 50 independent uniform random variables. The functions

More information on the required arguments is given in the appendix
in Section . The discrete quantile functions
` binomial-quant` and ` poisson-quant` return values of a left
continuous inverse of the cdf. The pmf's for these distributions are
only defined for integer arguments. The quantile functions and random
variable generators for the beta, gamma, , t and F
distributions are presently calculated by inverting the cdf and may
be a bit slow.

The state of the internal random number generator can be ``randomly''
reseeded, and the current value of the generator state can be saved. The
mechanism used is the standard Common Lisp mechanism. The current random
state is held in the variable ` *random-state*`. The function
` make-random-state` can be used to set and save the state. It
takes an optional argument. If the argument is ` NIL` or omitted
` make-random-state` returns a copy of the current value of
` *random-state*`. If the argument is a state object a copy of it
is returned. If the argument is ` t` a new, ``randomly''
initialized state object is produced and returned.

Tue Jan 21 15:04:48 CST 1997