Travis Oliphant wrote: > On Feb 16, 2010, at 5:00 AM, Brecht Machiels wrote: >> I have written a subclass of Python's complex type, which only adds a >> couple of properties that return values calculated from the real and >> imaginary parts (magnitude and angle, for example). >> >> Now I would like to store objects of this new type in an ndarray. As the >> new type doesn't store more information than a complex number, the >> ndarray's dtype can be 'complex'. I also assume that is is better for >> performance to use dtype=complex instead of dtype=object? Using >> dtype=complex also ensures that anything put into the array can be cast >> to a complex. >> >> However, I would like the array to return objects of my new type when I >> retrieve an item from the ndarray. I'm not sure how to do that. I would >> rather avoid having to define the new type in C. > > 2) Subclass the ndarray to do what you want.
I have subclassed ndarray, but I'm not sure how to continue from there. I was thinking of overriding __getitem__ and casting the complex to my complex subclass. Would that be the way to go? How would that work with slices? Kind regards, Brecht _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion
