Re: [Numpy-discussion] Call for a vote on .M .A .T .H attributes

[Charles R Harris]

Does anyone use transpose for anything besides two dimensional arrays? For arrays that aren't matrices at heart the meaning of transpose is pretty arbitrary, so the only virtue I see in having an attribute would be less typeing. So put it in the documentation. As an aside, being able to specify axis in dot might obviate many cases of *.T and *.H and make inner a special case.

>
> 1) .T  Have some kind of .T attribute

 +1

>
>    If >0 on this then:
>
>    a) .T == .swapaxes(-2,-1)

-1

>    b) .T == .transpose()

+1

>    c) .T raises error for ndim > 2

 
-1

>
>    d) .T returns (N,1) array for length (N,) array

-1

>    e) .T returns self for ndim < 2

 
+1

>
> 2) .H  returns .T.conj()

 
+1

>
> 3) .M  returns matrix version of array

no opinion.

>
> 4) .A  returns basearray (useful for sub-classes).

no opinion

Chuck

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