[Numpy-discussion] numpy.ma bug: need sanity check in masked_where
Stéfan van der Walt
stefan@sun.ac...
Tue Mar 18 17:49:32 CDT 2008
Hi Pierre
Thanks for your fix for #703. Unfortunately, it seems to have broken
some tests:
http://buildbot.scipy.org/builders/Windows_XP_x86_MSVC/builds/276/steps/shell_2/logs/stdio
Regards
Stéfan
On Mon, Mar 17, 2008 at 7:26 PM, Eric Firing <efiring@hawaii.edu> wrote:
> Pierre,
>
> I just tripped over what boils down to the sequence given below. It
> would be useful if the error in line 53 were trapped right away; as it
> is, it results in a masked array that looks reasonable but fails in a
> non-obvious way.
>
> Eric
>
> In [52]:x = [1,2]
>
> In [53]:y = ma.masked_where(False, x)
>
> In [54]:y
> Out[54]:
> masked_array(data = [1 2],
> mask = False,
> fill_value=999999)
>
>
> In [55]:y[1]
> ---------------------------------------------------------------------------
> IndexError Traceback (most recent call last)
>
> /home/efiring/<ipython console> in <module>()
>
> /usr/local/lib/python2.5/site-packages/numpy/ma/core.pyc in
> __getitem__(self, indx)
> 1307 if not getattr(dout,'ndim', False):
> 1308 # Just a scalar............
> -> 1309 if m is not nomask and m[indx]:
> 1310 return masked
> 1311 else:
>
> IndexError: 0-d arrays can't be indexed
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