[Numpy-discussion] problem with poisson generators
fccoelho at gmail.com
Tue Jul 12 13:34:21 EDT 2005
I am having problems with the poisson random number generators of both
Numarray and Numeric.
I can't replicate it when calling the function from the python cosonle, but
it has consistently malfunctioned when used within one of my scripts.
What happens is that it frequently return a value greater than zero when
called with zero mean: poisson(0.0)
Unfortunately My program is too big to send attached but I have confirmed
the malfunction by printing both the mean and the result whenever it spits
out a wrong result.
This is very weird indeed, I have run poisson millions of times by itsel on
the python console, without any problems...
I hope it is some stupid mistake, but when I replace the poisson function
call within my program by the R equivalent command (rpois) via the rpy
wrapper, everything works just fine...
Flávio Codeço Coelho
registered Linux user # 386432
Great spirits have always found violent opposition from mediocrities. The
latter cannot understand it when a man does not thoughtlessly submit to
hereditary prejudices but honestly and courageously uses his intelligence.
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