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johansoderstrom
Total Points:
40
Registered User
November 13, 2008 3:13 AM PST
RANDOM_SEED() and RANDOM_NUMBER()

Hi again

I am trying to obtain a set of random numbers and I use this code:

      USE DFPORT

      REAL T1

      CALL RANDOM_SEED()

      CALL RANDOM_NUMBER(T1)

Now this does give me a random number, based on the date and time... But if I call it several times in a row (fast) it seems to me that the Random numbers do not change (I convert them into a Gaussian distribution and I typically get a set of random numbers but the same number being repeated over 20 times until it changes) - as the time is the same... is there any way of initializing RANDOM_SEED() with time and date, but with...say... microseconds instead of seconds (or what is used in the routine right now)... to get "more" randomized numbers...

I hope this makes sence... 

Thanks,

Johan S

andi_zuend
Total Points:
140
Status Points:
0
Green Belt
November 13, 2008 4:39 AM PST
Rate
 
#1
Hi,

I guess your target is to get a new random number at every call to RANDOM_NUMBER, so you only need once (or never, see the User and Reference Guides) to call RANDOM_SEED. This is just to seed the random number generator at the beginning, thus, it shouldn't be called in a loop.

best,
Andi


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