Re: [Matplotlib-users] filled contours, and missing data

[Stephen W. <ste...@cs...>]

Stephen Walton wrote, in the context of using masked arrays rather than 
a keyword argument which would be the mask:

> It would be more flexible.  Instead of having to actually replace data 
> with NaN, you could create a mask which marked data to be ignored for 
> the moment:

This is, of course, incorrect.  Both approaches would allow arbitrary 
data sets to be masked as needed.

There was a mention over on an astronomy group of the progress being 
made in masked astronomical images.  Here too, the mask "comes along" 
with the data.  Perry et al., does STScI anticipate using 
numarray/Numeric masked arrays within PyFITS to handle this?