[SciPy-dev] hyper1f1, ticket #659

Johann Cohen-Tanugi cohen@slac.stanford....
Wed May 28 06:53:37 CDT 2008


hello,
I confirm this on my linux box with a very recent version of scipy from 
the bzr trunk. It seems somewhat related to 
http://www.scipy.org/scipy/scipy/ticket/419 ....
Anyway, this should be fixed....
Johann

Moritz Helias wrote:
> Hi,
>
> I found some strange behavior of the hypergeometric function with real  
> arguments (hyp1f1). I do not know, who is the specialist on this  
> subject, but
> could somebody please try to reproduce it (see ticket #659,  
> attached .py file): For large negative x, the function becomes quite  
> jagged.
>
> I also described a possible reason and a workaround in the ticket. My  
> work relies on this function, so currently I have to patch each of my  
> scipy installations to continue working.
> If the bug can be reproduced by others, is there the possibility that  
> I provide a patch?
>
> Thanks in advance,
>
> greetings,
>
> Moritz
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