[Numpy-discussion] masked array with mask an instance of numpy.memmap

Pierre GM pgmdevlist@gmail....
Tue Mar 27 17:56:04 CDT 2007

> Is there something deficient about numpy.core.ma?

numpy.core.ma objects are not ndarrays. Therefore, their mask disappear when 
used as the input of something like numpy.array(data, subok=True), which is 
quickly problematic. 
Moreover, they are not especially subclassing-friendly, which was my biggest 
bone, and the main reason why I started rewriting the implementation.

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