Re: [Numpy-discussion] matmul needs some clarification.

2015-06-04 Thread Charles R Harris
On Thu, Jun 4, 2015 at 6:50 PM, Alexander Belopolsky wrote: > > On Wed, Jun 3, 2015 at 5:12 PM, Charles R Harris < > charlesr.har...@gmail.com> wrote: > >> but is as good as dot right now except it doesn't handle object arrays. > > > > This is a fairly low standard. :-( > Meaning as fast. I expe

Re: [Numpy-discussion] matmul needs some clarification.

2015-06-04 Thread Alexander Belopolsky
On Wed, Jun 3, 2015 at 5:12 PM, Charles R Harris wrote: > but is as good as dot right now except it doesn't handle object arrays. This is a fairly low standard. :-( ___ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/ma

Re: [Numpy-discussion] matmul needs some clarification.

2015-06-03 Thread Charles R Harris
On Wed, Jun 3, 2015 at 1:38 PM, Alexander Belopolsky wrote: > > On Sat, May 30, 2015 at 6:23 PM, Charles R Harris < > charlesr.har...@gmail.com> wrote: > >> The problem arises when multiplying a stack of matrices times a vector. >> PEP465 defines this as appending a '1' to the dimensions of the v

Re: [Numpy-discussion] matmul needs some clarification.

2015-06-03 Thread Charles R Harris
On Wed, Jun 3, 2015 at 2:25 PM, Stephan Hoyer wrote: > On Sat, May 30, 2015 at 3:23 PM, Charles R Harris < > charlesr.har...@gmail.com> wrote: > >> The problem arises when multiplying a stack of matrices times a vector. >> PEP465 defines this as appending a '1' to the dimensions of the vector and

Re: [Numpy-discussion] matmul needs some clarification.

2015-06-03 Thread Stephan Hoyer
On Sat, May 30, 2015 at 3:23 PM, Charles R Harris wrote: > The problem arises when multiplying a stack of matrices times a vector. > PEP465 defines this as appending a '1' to the dimensions of the vector and > doing the defined stacked matrix multiply, then removing the last dimension > from the

Re: [Numpy-discussion] matmul needs some clarification.

2015-06-03 Thread Alexander Belopolsky
On Sat, May 30, 2015 at 6:23 PM, Charles R Harris wrote: > The problem arises when multiplying a stack of matrices times a vector. > PEP465 defines this as appending a '1' to the dimensions of the vector and > doing the defined stacked matrix multiply, then removing the last dimension > from the

[Numpy-discussion] matmul needs some clarification.

2015-06-01 Thread Charles R Harris
Hi All, The problem arises when multiplying a stack of matrices times a vector. PEP465 defines this as appending a '1' to the dimensions of the vector and doing the defined stacked matrix multiply, then removing the last dimension from the result. Note that in the middle step we have a stack of ma