Subject: RE: SDL-News: how to generate a random number in SDL?
From: Scott Shen (Scott.Shen#holleycomm.com)
Date: Tue Feb 18 2003 - 22:11:32 GMT
Hi Laurent:
I talked to some people and some said ANY should give us a random number. I
am not familiar with ObjectGeode, so how about Tau?
I am using Cinderella v1.3, and this is what the company told me:
"ANY generates a random number ..." and "In Cinderella SDL, the random
generator is based on the C function rand() which returns a pseudo random
number."
Anyway, the Cinderella ANY does give me a random number sequence good enough
in terms of mean value and no obvious pattern. I hope in the future ANY (or
something else) in Z.100 can be designated clearly as a random number
generator.
Thanks for your helps,
Scott
-----Original Message-----
From: doldi.laurent#wanadoo.fr [mailto:doldi.laurent#wanadoo.fr]
Sent: February 18, 2003 12:43 AM
To: Scott Shen
Subject: RE: SDL-news: how to generate a random number in SDL?
Hi Scott,
Beware that as Rick said, the Z.100 SDL definition does not
specify that ANY is random. Therefore, you are lucky to get
a random number with the tool you use.
Your SDL model is no longer portable, for example if you use it
with another tool, ANY might not be random (for example in
ObjectGeode SDL Simulator, ANY is not random).
Regards,
Laurent.
At 15:35 17/02/2003 -0800, you wrote:
>>>>
Hi Rick:
Thanks again. I tried the ANY approach and the result seems largely OK. I
tested the value of 5000 ANY integer (0:100) and the mean value was like
49.7 and the values generated didn't seem to have obvious pattern.
I am curious, SDL is very popular in telecom industry so why hasn't a
"true" random number generator (with specified randomness) been officially
supported?
Regards,
Scott
<<<<
Laurent DOLDI
*** book: SDL Illustrated *** see http://perso.wanadoo.fr/doldi/sdl
TransMeth Sud-Ouest
27, av. Segoffin 31400 TOULOUSE FRANCE
Tel.: +33 5 61 25 59 54 Fax: +33 6 07 74 87 71
Mobile: +33 6 80 26 62 31
Hi Laurent:
I talked to some people and some said ANY should give us a random number. I am not familiar with ObjectGeode, so how about Tau?
I am using Cinderella v1.3, and this is what the company told me:
"ANY generates a random number ..." and "In Cinderella SDL, the random generator is based on the C function rand() which returns a pseudo random number."
Anyway, the Cinderella ANY does give me a random number sequence good enough in terms of mean value and no obvious pattern. I hope in the future ANY (or something else) in Z.100 can be designated clearly as a random number generator.
Thanks for your helps,
Scott
-----Original Message-----
From: doldi.laurent#wanadoo.fr [mailto:doldi.laurent#wanadoo.fr]
Sent: February 18, 2003 12:43 AM
To: Scott Shen
Subject: RE: SDL-News: how to generate a random number in SDL?
Hi Scott,
Beware that as Rick said, the Z.100 SDL definition does not
specify that ANY is random. Therefore, you are lucky to get
a random number with the tool you use.
Your SDL model is no longer portable, for example if you use it
with another tool, ANY might not be random (for example in
ObjectGeode SDL Simulator, ANY is not random).
Regards,
Laurent.
At 15:35 17/02/2003 -0800, you wrote:
>>>>
Hi Rick:
Thanks again. I tried the ANY approach and the result seems largely OK. I
tested the value of 5000 ANY integer (0:100) and the mean value was like
49.7 and the values generated didn't seem to have obvious pattern.
I am curious, SDL is very popular in telecom industry so why hasn't a
"true" random number generator (with specified randomness) been officially
supported?
Regards,
Scott
<<<<
Laurent DOLDI
*** book: SDL Illustrated *** see http://perso.wanadoo.fr/doldi/sdl
TransMeth Sud-Ouest
27, av. Segoffin 31400 TOULOUSE FRANCE
Tel.: +33 5 61 25 59 54 Fax: +33 6 07 74 87 71
Mobile: +33 6 80 26 62 31
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