Re: Random Seed question

[Rick Riolo]

If I recall correctly (ted could tell us for sure),
Drone uses what might be viewed as a more compressed
way of "storing" a stream of RNG seeds:  it starts
with a number created from the clock and task number,
and uses that as a seed for one kind of RNG, which
then creates a sequence of numbers to use as seeds
for some other kind of RNG.   It is important, of course,
to use different kinds of RNGs for the seed generator
vs what is used in your simulation.

Thus its "more compressed" in that you just have to record
that first seed generated from the clock and process number
(and the seed generator algorithm, of course!).

- r

Rick Riolo                           address@hidden
Center for Study of Complex Systems (CSCS)
4477 Randall Lab                
University of Michigan         Ann Arbor MI 48109-1120
Phone: 734 763 3323                  Fax: 734 763 9267
http://www.pscs.umich.edu/PEOPLE/rlr-home.html

On Sat, 29 Jan 2000, glen e. p. ropella wrote:

> Date: Sat, 29 Jan 2000 07:52:27 -0800
> From: glen e. p. ropella <address@hidden>
> Reply-To: address@hidden
> To: address@hidden
> Subject: Re: Random Seed question
> 
> At 07:50 PM 1/28/00 -0800, you wrote:
> >Feel free to correct me if I am wrong, but I believe a good RNG should not
> >need a special seed.  That is one of the requirements.  I tend to choose
> >phone numbers, permutations of my social security number,  or other
> >interesting number patterns.  I then enter about 40 of these into a text
> >file and go through them in order when I'm running multiple experiments with
> >my model.
> 
> These are good ideas.  Or, if you're like me and you're too lazy
> to think up your own seeds, you can use:
>     http://www.random.org/
> Since we now have the Java layer, it should be relatively easy to
> use the jdk client on their site to grab random numbers....as long
> as you're on-line.  If you're off-line, you can always just generate
> a bunch of them and put them in a file, like Doug suggested.
> 
> glen
> 
> --
> glen e. p. ropella =><= Feeding the hamster wheel.  Hail Eris!
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