[Numpy-discussion] defmatrix.py
Travis Oliphant
oliphant@ee.byu....
Mon Mar 26 15:38:04 CDT 2007
Charles R Harris wrote:
>
>
> On 3/26/07, *Travis Oliphant* <oliphant@ee.byu.edu
> <mailto:oliphant@ee.byu.edu>> wrote:
>
> Charles R Harris wrote:
>
> >
> >
> > On 3/26/07, *Nils Wagner* <nwagner@iam.uni-stuttgart.de
> <mailto:nwagner@iam.uni-stuttgart.de>
> > <mailto: nwagner@iam.uni-stuttgart.de
> <mailto:nwagner@iam.uni-stuttgart.de>>> wrote:
> >
> > Charles R Harris wrote:
> > >
> > >
> > > On 3/25/07, *Nils Wagner* <nwagner@iam.uni-stuttgart.de
> <mailto:nwagner@iam.uni-stuttgart.de>
> > <mailto:nwagner@iam.uni-stuttgart.de
> <mailto:nwagner@iam.uni-stuttgart.de>>
> > > <mailto: nwagner@iam.uni-stuttgart.de
> <mailto:nwagner@iam.uni-stuttgart.de>
> > <mailto:nwagner@iam.uni-stuttgart.de
> <mailto:nwagner@iam.uni-stuttgart.de>>>> wrote:
> > >
> > > Hi,
> > >
> > >
> >
> > <snip>
> >
> > Ok, things should be working now. In order to get rid of the scipy
> > problems I just needed to rm the scipy package in site-packages and
> > then reinstall.
> >
> > I still need to figure out a real fix down in the dot routine
> because
>
>
> No, don't fix the dot routine. Remember the dot routine should accept
> mixed 2-d arrays and 1-d arrays because it is more general than matrix
> multiplication.
>
>
> Sure, but it can't return a row vector when multiplying a 1-d vector.
> It just ain't mathematically possible no matter how the 1-d vector is
> interpreted. It needs to return either a column vector or a 1-d vector.
Ah.. I see what your point is.
How to fix that. The problem is choosing the Python type of the output
array. It's being selected as matrix right now because of the
precedence of the matrix subtype, but it should be chosen as array in
this instance. Perhaps we should make dot always choose the array as
the output type??
-Travis
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