Author: Vincent Diepeveen
Date: 20:11:36 08/17/02
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On August 17, 2002 at 17:18:19, Dieter Buerssner wrote: This is a few hours test knowing your programming skills dieter. make something that checks for collissions and then create a new set of random numbers using 2 numbers of 32 bits from several random generators. Of course the first one to use is rand() from the system, that's what everybody starts with :) >On August 17, 2002 at 17:01:17, Will Singleton wrote: > >>Did you test for randomness also? In my tests, combining 2 32-bit ints results >>in a pretty severe bunching of numbers. I did a graphical look at all the >>generated numbers (just stuck them on Excel), and the difference was startling. > >What was the difference you saw? Could you give me an "algorithm" to see the >difference? Which 32-bit pseudo random number generator (PRNG) did you use, and >which 64 bit PRNG, where you saw that difference? I hope, my questions don't >sound provocative - I am really interested. > >Perhaps some contributors to this thread may find >http://stat.fsu.edu/~geo/diehard.html interesting. There are a lot of tests for >the "randomness" of PRNGs, and it is pretty easy to try out your own favorite >PRNG with those tests. However, interpreting the results may need some >statistical knowledge. > >Regards, >Dieter
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