On 3/24/07, Alan G Isaac <[EMAIL PROTECTED]> wrote:
On Sat, 24 Mar 2007, Charles R Harris apparently wrote: > I think it is reasonable to raise an exception in this > case, but that is not how numpy currently works, so it is > a larger policy decision that I can't make on my own. For > the case under consideration it is possible to define 1-D > to 2-D rules that are consistent and work, so I am > thinking of adding those to the __mul__ operator of the > matrix class. However, as you say, such rules are more > likely to let some errors slip by. In essence, it is > rather like type conversion in mixed expressions: > convenient, but open to error. Your proposed change is also not how numpy currently works.
True, numpy currently returns an incorrect result. We can either fix that, or we can disallow 1-D vectors in matrix computations. But I hesitate to do the latter without discussion and agreement on the list. Chuck
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