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Noise Seed

Posted by Raul on June 14, 2010 at 2:36am

Hi,

 

I am trying to add in an error model into my simulation. I come across this term "seed" in many articles and i do not have much knowledge on it. While i understand that this is needed to generate random noise values but i wish to know how do i define/calculate this "seed" value? Please advise.

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Replies

  • M Luckham October 6, 2010 at 1:05pm
    It's just a number. Most random() functions require a "seed" number - because they aren't truly random-number functions they are just produce pseudo-random number sequences. If you run the program twice with the same value as "seed", you will get the same sequence of numbers from random(). The solution is to choose a different number for "seed" each time - perhaps get the system time and use the number of microseconds as the "seed" value to the first random() call.
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