[Numpy-discussion] Preventing an ndarray subclass from returning new subclass instances for std(), etc

Stéfan van der Walt stefan@sun.ac...
Sun Sep 18 14:25:14 CDT 2011

On Sun, Sep 18, 2011 at 9:48 AM, Keith Hughitt <keith.hughitt@gmail.com> wrote:
> Interesting. It works as expected when called as a method:
> In [10]: x = np.ma.array([[1,2,3]])
> In [11]: x.std()
> Out[11]: 0.81649658092772603

I'm guessing that np.ma.array implements its own std function, but I
haven't checked.


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