[Numpy-discussion] the path forward
Alan G Isaac
aisaac@american....
Tue Apr 29 15:55:53 CDT 2008
On Tue, 29 Apr 2008, Bruce Southey apparently wrote:
> There is no additional benefit from having row or column
> shapes or metadata because the row/column nature is
> usually predetermined and would be represented by the
> shape of the corresponding matrix.
The problem is that ``x[0]`` being 2d has produced a variety
of anomalies, and the natural fix is for ``x[0]`` to be 1d.
Gael has argued strongly that she should be able to use the
following notation: ``x[0,:]*A*x[:,0]``. But this will work
only if ``x[0,:]`` is 2d or if it is 1d but has an "orientation".
So *if* you think ``x[0] == x[0,:]`` is desirable, *and* you
want to satisfy Gael, *then* it seems you must introduce 1d
"oriented" vectors.
I believe Travis is also suggesting that we travel that
road, taking a first step as follows:
for now let ``x[0]`` be a 1d array to quickly fix the
anomalies, but let ``x[0,:]`` continue to be a matrix
until the vector code is written, at which point ``x[0]``
and ``x[0,:]`` we be the same "row vector".
Or so I have understood things.
Cheers,
Alan Isaac
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