[Numpy-discussion] Raveling, reshape order keyword unnecessarily confuses index and memory ordering

Chris Barker - NOAA Federal chris.barker@noaa....
Wed Apr 3 16:52:24 CDT 2013


On Wed, Apr 3, 2013 at 11:39 AM, Matthew Brett <matthew.brett@gmail.com> wrote:
> It was not enough for me or the three others who will publicly admit
> to the shame of finding it confusing without further thought.

I would submit that some of the confusion came from the fact that with
ravel(), and the 'A' and 'K' flags, you are forced to figure out BOTH
index_order and memory_order -- with one flag -- I know I'm still not
clear what I'd get in complex situations.

> Again, I just can't see a reason not to separate these ideas.

I agree, but really separating them -- but ideally having a given
function only deal with one or the other, not both at once.

>  We are
> not arguing about backwards compatibility here, only about clarity.

while it could be changed while strictly maintaining backward
compatibility -- it is a change that would need to filter through the
docs, example, random blog posts, stack=overflow questions, etc......

Is that worth it? I'm not convinced

> Right.   I think you may now be close to my own discomfort when faced
> with working out (fast) what:
>
> np.reshape(a, (3,4), order='F')

I still think it's cause you know too much.... ;-)

-Chris


-- 

Christopher Barker, Ph.D.
Oceanographer

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