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Re: Random Number Replication [message #16585 is a reply to message #16584]

Fri, 06 August 1999 00:00

Andy Loughe
Messages: 174
Registered: November 1995

Senior Member

David Sheerin wrote:
>
> Hi
> I have tried to use the following code to generate a sequence of
> random numbers:
>
> FOR k = 1, 4 DO BEGIN
> p = RANDOMU (S)
> PRINT, p
> ENDFOR
>
> Why, when I repeat the operation, does the code (nearly) give me the
> same list of random numbers shifted by 1? I thought that each time
> RANDOMU was called it took a new value for the SEED due to S being
> undefined. How do I 'undefine' S after it has been called?
>
> Cheers
>
> David Sheerin

I am unable to replicate your results.

I always set the intial seed in this manner...

S = long( ( systime(1) - long(systime(1)) ) * 1.e8 )

p = randomu(S)

--
Andrew F. Loughe | email: afl@cdc.noaa.gov
NOAA-CIRES CDC Mail Code: R/E/CD1 | www :
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sense, reason, and intellect has intended us to forego their use."
-Galileo

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		Re: Random Number Replication By: korpela on Fri, 06 August 1999 00:00
		Re: Random Number Replication By: Andy Loughe on Fri, 06 August 1999 00:00

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