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

Bruce Southey bsouthey at gmail.com
Fri Jul 7 08:03:21 CDT 2006


On 7/6/06, Travis Oliphant <oliphant.travis at ieee.org> wrote:
>
> This is a call for a vote on each of the math attributes.  Please post
> your vote as
>
> +1 :  support
> +0 :  don't care so go ahead
> -0 :  don't care so why do it
> -1 :  against
>
> Vote on the following issues separately:
>
>
>
> 1) .T  Have some kind of .T attribute
-1 because I prefer what is already present although I would prefer
the option of inplace or a taking a copy. Also I don't find .T
particularly intuitive (for example,  R and SAS IML have a t()
function - SAS IML also uses a backtick but that has not been very
portable).

>
>    If >0 on this then:
>
>    a) .T == .swapaxes(-2,-1)
>
>    b) .T == .transpose()
>
>    c) .T raises error for ndim > 2
>
>    d) .T returns (N,1) array for length (N,) array
>
>    e) .T returns self for ndim < 2
>
>
> 2) .H  returns .T.conj()

-/+0 I don't care either way.

>
>
> 3) .M  returns matrix version of array

-1 as I think asmatrix etc is clearer.

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

-1 as I think something like asarray etc is clearer and require
explicit calling.

>
>
>
> -Travis
>
>
>
>
>
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