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MathGroup Archive 2003

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RE: Random Trouble

  • To: mathgroup at smc.vnet.net
  • Subject: [mg39193] RE: [mg39178] Random Trouble
  • From: "David Park" <djmp at earthlink.net>
  • Date: Mon, 3 Feb 2003 01:08:56 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

Donald,

Put

myrandom = Random[]

and it will be fixed once and for all. But then why use Random at all? You
probably want to run different cases, each with a different random number.
Then use...

With[{myrandom = Random[]},
code using myrandom]

Then myrandom is fixed once and replaced in all its instances in the code.
For example...

With[{myrandom = Random[]},
  {myrandom, myrandom}]
{0.655465, 0.655465}

David Park
djmp at earthlink.net
http://home.earthlink.net/~djmp/

From: Donald Darling [mailto:ddarling at math.uci.edu]
To: mathgroup at smc.vnet.net

I have a program which uses a random number in several places - the same
number in a given run of the program. When I implement the program however
the number changes in every new call to it.  I've tried to overcome this
using "Which", "Hold", "Verbatim", and others, all to no avail.  Any help
greatly appreciated.





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