Merged changes from the 1.5.2p2 release.
(Very rough.)
diff --git a/Doc/lib/libwhrandom.tex b/Doc/lib/libwhrandom.tex
index b79377d..b745f5b 100644
--- a/Doc/lib/libwhrandom.tex
+++ b/Doc/lib/libwhrandom.tex
@@ -1,13 +1,27 @@
\section{\module{whrandom} ---
- Floating point pseudo-random number generator.}
-\declaremodule{standard}{whrandom}
+ Pseudo-random number generator}
+\declaremodule{standard}{whrandom}
\modulesynopsis{Floating point pseudo-random number generator.}
This module implements a Wichmann-Hill pseudo-random number generator
-class that is also named \code{whrandom}. Instances of the
-\code{whrandom} class have the following methods:
+class that is also named \class{whrandom}. Instances of the
+\class{whrandom} class conform to the Random Number Generator
+interface described in section \ref{rng-objects}. They also offer the
+following method, specific to the Wichmann-Hill algorithm:
+
+\begin{methoddesc}[whrandom]{seed}{\optional{x, y, z}}
+ Initializes the random number generator from the integers \var{x},
+ \var{y} and \var{z}. When the module is first imported, the random
+ number is initialized using values derived from the current time.
+ If \var{x}, \var{y}, and \var{z} are either omitted or \code{0}, the
+ seed will be computed from the current system time. If one or two
+ of the parameters are \code{0}, but not all three, the zero values
+ are replaced by ones. This causes some apparently different seeds
+ to be equal, with the corresponding result on the pseudo-random
+ series produced by the generator.
+\end{methoddesc}
\begin{funcdesc}{choice}{seq}
Chooses a random element from the non-empty sequence \var{seq} and returns it.
@@ -31,17 +45,23 @@
Returns a random real number \var{N} such that \code{\var{a}<=\var{N}<\var{b}}.
\end{funcdesc}
-When imported, the \code{whrandom} module also creates an instance of
-the \code{whrandom} class, and makes the methods of that instance
+When imported, the \module{whrandom} module also creates an instance of
+the \class{whrandom} class, and makes the methods of that instance
available at the module level. Therefore one can write either
\code{N = whrandom.random()} or:
+
\begin{verbatim}
generator = whrandom.whrandom()
N = generator.random()
\end{verbatim}
+Note that using separate instances of the generator leads to
+independent sequences of pseudo-random numbers.
+
\begin{seealso}
- \seemodule{random}{generators for various random distributions}
+ \seemodule{random}{Generators for various random distributions and
+ documentation for the Random Number Generator
+ interface.}
\seetext{Wichmann, B. A. \& Hill, I. D., ``Algorithm AS 183:
An efficient and portable pseudo-random number generator'',
\citetitle{Applied Statistics} 31 (1982) 188-190.}