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Mikael Djurfeldt 1999-01-21 09:32:45 +00:00
parent ec1bbf3918
commit 416075f1ee
1 changed files with 11 additions and 7 deletions
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18
NEWS
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@ -89,10 +89,10 @@ same type between zero (inclusive) and N (exclusive). The values
returned have a uniform distribution.
The optional argument STATE must be of the type produced by
`(make-random-state)'. It defaults to the value of the variable
`*random-state*'. This object is used to maintain the state of the
pseudo-random-number generator and is altered as a side effect of
the `random' operation.
`copy-random-state' or `seed->random-state'. It defaults to the value
of the variable `*random-state*'. This object is used to maintain the
state of the pseudo-random-number generator and is altered as a side
effect of the `random' operation.
** New variable: *random-state*
Holds a data structure that encodes the internal state of the
@ -102,13 +102,17 @@ printed out and successfully read back in, but may or may not
function correctly as a random-number state object in another
implementation.
** New function: make-random-state [STATE|SEED]
** New function: copy-random-state [STATE]
Returns a new object of type suitable for use as the value of the
variable `*random-state*' and as a second argument to `random'.
If argument STATE is given, a copy of it is returned. Otherwise a
copy of `*random-state*' is returned.
If SEED is given (a string or an integer), a new state is
generated and initialized using SEED.
** New function: seed->random-state SEED
Returns a new object of type suitable for use as the value of the
variable `*random-state*' and as a second argument to `random'.
SEED is a string or a number. A new state is generated and
initialized using SEED.
** New function: random:uniform [STATE]
Returns an uniformly distributed inexact real random number in the