[Numpy-discussion] Any Numeric or numarray users on this list?

Travis Oliphant oliphant.travis at ieee.org
Tue Jun 13 11:52:07 CDT 2006


konrad.hinsen at laposte.net wrote:
> On 10.06.2006, at 01:57, Travis Oliphant wrote:
>
>   
>> You may be interested to note that I just added the RNG interface  
>> to numpy for back-wards compatibility.  It can be accessed and used  
>> by re-placing
>>
>> import RNG
>>
>> with
>>
>> import numpy.random.oldrng as RNG
>>     
>
> Thanks, that will facilitate the transition. Is this just a  
> compatible interface, or actually the same algorithm as in the  
> original RNG module?
>   

If I understand your question correctly, then it's just a compatibility 
interface.   I'm not sure which part of the original algorithm you are 
referring to.  

The random numbers are generated by the Mersenne Twister algorithm in 
mtrand.  Each generator in numpy.random.oldrng creates a new RandomState 
for generation using that algorithm.    The density function 
calculations were taken from RNG, but the random-number generators 
themselves are methods of the RandomState.  


-Travis






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