Mercurial > octave-nkf
changeset 14610:41d7e23f5734
Document rand's seed difference from Matlab
* rand.cc (Frand): Mention in docstring that seed is randomly chosen,
not always fixed at startup. Give hint on how to obtain Matlab-like
behaviour.
| author | Jordi Gutiérrez Hermoso <jordigh@octave.org> |
|---|---|
| date | Tue, 08 May 2012 23:23:02 -0400 |
| parents | 3edba8b5f430 |
| children | f2ed09ae8d3f |
| files | src/DLD-FUNCTIONS/rand.cc |
| diffstat | 1 files changed, 4 insertions(+), 1 deletions(-) [+] |
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--- a/src/DLD-FUNCTIONS/rand.cc Tue May 08 18:02:24 2012 -0700 +++ b/src/DLD-FUNCTIONS/rand.cc Tue May 08 23:23:02 2012 -0400 @@ -358,7 +358,10 @@ \n\ By default, the generator is initialized from @code{/dev/urandom} if it is\n\ available, otherwise from CPU time, wall clock time, and the current\n\ -fraction of a second.\n\ +fraction of a second. Note that this differs from @sc{Matlab}, which\n\ +always initializes the state to the same state at startup. To obtain\n\ +behavior comparable to @sc{Matlab}, initialize with a deterministic state\n\ +vector in Octave's startup files (@pxref{Startup Files}).\n\ \n\ To compute the pseudo-random sequence, @code{rand} uses the Mersenne\n\ Twister with a period of @math{2^{19937}-1} (See M. Matsumoto and\n\