[Numpy-discussion] Re: median filtering question -- masked arrays
verveer at embl-heidelberg.de
Thu Jun 24 05:34:07 CDT 2004
> Does anyone have a hint for applying a median filter to a masked 2D
> array in numarray?
> I"ve been using the kludge of extracting a normal array with the
> masked data replaced by the overall median of the array and median
> filtering that (with the appropriate nd_image method). But this is a
> crude approximation and I"d like to do better -- preferably without
> coding my own median filter in C.
Masks are not supported by the filters in nd_image. It could be done,
but that would be a considerable effort for a rather exotic feature, so
that won't happen soon. In the near future I will however add support
for generic filters where you can provide your own filter function to
be executed at each point. That may make it easy enough to roll your
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