[Numpy-discussion] Matlab/Numpy index order
Tue May 12 14:55:16 CDT 2009
On Tue, May 12, 2009 at 2:51 PM, brechmos <firstname.lastname@example.org> wrote:
> So, in Numpy I have to reshape it so the "slices" are in the first
> dimension. Obviously, I can do a b.transpose( (1,2,0) ) to get it to look
> like Matlab, but...
> I don't understand why the index ordering is different between Matlab and
> Numpy. (It isn't a C/Fortran ordering thing, I don' think).
Actually, that's precisely the reason.
> Is the data access faster if I have b without the tranpose, or can I
> transpose it so it "looks" like Matlab without taking a hit when I do
> imshow( b[:,:,0] ).
It's going to be faster to do it without the transpose. Besides, for numpy,
that imshow becomes:
Which, IMHO, looks better than Matlab.
Graduate Research Assistant
School of Meteorology
University of Oklahoma
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