[Numpy-discussion] Re: A random.normal function with stdev as array

Robert Kern robert.kern at gmail.com
Wed Apr 5 11:35:01 CDT 2006

> Bruce Southey wrote:

>>>From a different view, you need to be very careful with your
>>(pseudo)random number generator with that many samples. These have a
>>tendency to repeat so your random number stream is no longer random.
>>See the Wikipedia entry:
>>If I recall correctly, the Python random number generator is a
>>Mersenne twister but ranlib  is not and so prone to the mentioned
>>problems. I do not know if SciPy adds any other generators.

numpy.random uses the Mersenne Twister. RANLIB is dead! Long live MT19937!

Robert Kern
robert.kern at gmail.com

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco

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