[SciPy-user] accuracy of stats.gamma.pdf
Nicolas Chopin
nicolas.chopin at bristol.ac.uk
Thu Jan 29 04:48:01 EST 2009
Dear list,
when I compute:
stats.gamma.pdf(5.,2.,5.)
I get:
array([0.])
whereas the same command in R outputs:
> dgamma(5.,2.,5.)
[1] 1.735993e-09
Is this a bug, and then should I report it somewhere?
Or is it just that scipy's implementation of the gamma pdf is a bit
less accurate than R's?
I need to compute log-pdf's, so I need relative accuracy, not absolute
accuracy;
but I can implement my own log-pdf routine, of course.
Thank you in advance for your wise replies.
Nicolas Chopin
<http://www.stats.bris.ac.uk/%7Emanxac/>
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