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Re: [ns] Problem with the generation of random numbers
It'll greatly help if you can provide some example scripts. I calculated
100 exponential values then 200 exponential ones, and the first 100 of the
second run are identical to those in the first run.
On Tue, 15 Aug 2000, Karim El-Khazen (ERA) wrote:
> Hi everybody,
>
> I'm having a problem with the generation of random numbers.
>
> 1 ) I'm computing N random variables with " Random::uniform() " THEN an exponential random variable using " ExponentialRandomVariable ". I get coherent results which seem correct. If I run this simulation plenty of time, I always get the same values, since I'm not changing any initial values.
> I tried after to change the number N of random uniform variables, the exponential value changed. It shouldn't, no ?
> These parameters are not correlated at all (except in the random generator?!).
>
> 2) Then I tried to reverse the order of these generations. For N=100, it gives me a result. For N=50, I get a "Floating Point Exception (core dumped)" !!!
>
> Is there anybody who can help me solve this problem ?
>
> Thanks in advance, Karim.
>
>
>
> Karim El-Khazen
> Email : [email protected] <mailto:[email protected]>
> Website : http://www.directmoving.com <http://www.directmoving.com>
>
> -----------------------------------------------------------------
> Karim C. El-Khazen [email protected] <mailto:[email protected]> http://www.elkhazen.com <http://www.elkhazen.com>
> MS in Electrical & Computer Engineering, Georgia Tech, Atlanta, USA
> Ericsson Radio Systems AB, S-164 80 Stockholm SWEDEN
> -----------------------------------------------------------------
>