[Numpy-discussion] Subclassing ma.MaskedArray

[David Carmean]

I understand that ma.MaskedArray is a subclass of ndarray;  in addition to the requirements 
for subclassing the latter, what does ma.MaskedArray add to the list?  I.e. what do I have to 
watch out for?

Basically I need a version of Luke Campagnola's MetaArray ( http://www.scipy.org/Cookbook/MetaArray )
that works with masked arrays.  My first attempts have failed.

Thanks.