[Numpy-discussion] Is this a bug in numpy.ma.reduce?

David Goldsmith d.l.goldsmith at gmail.com
Mon Mar 8 02:30:48 EST 2010

On Sun, Mar 7, 2010 at 4:41 AM, Friedrich Romstedt <
friedrichromstedt at gmail.com> wrote:

> 2010/3/5 Pierre GM <pgmdevlist at gmail.com>:
> > 'm'fraid no. I gonna have to investigate that. Please open a ticket with
> a self-contained example that reproduces the issue.
> > Thx in advance...
> > P.
> I would like to stress the fact that imo this is maybe not ticket and not a
> bug.
> The issue arises when calling a.max() or similar of empty arrays a, i.e.,
> with:
> >>> 0 in a.shape
> True
> Opposed to the .prod() of an empty array, such a .max() or .min()
> cannot be defined, because the set is empty.  So it's fully correct to
> let such calls fail.  Just the failure is a bit deep in numpy, and
> only the traceback gives some hint what went wrong.
> I posted something similar also on the matplotlib-users list, sorry
> for cross-posting thus.

Any suggestions, then, how to go about figuring out what's happening in my
code that's causing this "feature" to manifest itself?


> fwiw,
> Friedrich
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