Mathematica 9 is now available
Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
2005
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 2005

[Date Index] [Thread Index] [Author Index]

Search the Archive

SeedRandom and $SessionID

  • To: mathgroup at smc.vnet.net
  • Subject: [mg58603] SeedRandom and $SessionID
  • From: Kerry Kim <kjkim at u.washington.edu>
  • Date: Sat, 9 Jul 2005 04:08:03 -0400 (EDT)
  • Organization: University of Washington
  • Sender: owner-wri-mathgroup at wolfram.com

Hi Everyone,

I'm doing some Monte-Carlo simulations on a cluster.  Since by default 
the random number seed is based on the system time, I sometimes get the 
same seed being used in multiple Kernels if they're launched 
simultaneously from a shell script (something to avoid).  Is there any 
danger in using $SessionID as the random number seed?  Also, does anyone 
know the bounds on $SessionID (compared to the bounds on the random 
number seed) are and whether the processID is included in the 
calculation of $SessionID?  Alternatively, has anyone worked out a good 
way to seed the random number generator in Mathematica?

Thank you!
-Kerry Kim


  • Prev by Date: Re: Set of strings reducing problem
  • Next by Date: Re: Finite differences
  • Previous by thread: Re: GraphEdit.m & JavaGraphics.m
  • Next by thread: Complement replacement