On 07/08/2014 5:40 AM, Sebastian Berg wrote: > On Mi, 2014-08-06 at 14:05 -0700, Chris Barker wrote: >> On Wed, Aug 6, 2014 at 8:32 AM, Charles R Harris >> <charlesr.har...@gmail.com> wrote: >> Should also mention that we don't have the ability to operate >> on stacked vectors because they can't be identified by >> dimension info. One workaround is to add dummy dimensions >> where needed, another is to add two flags, row and col, and >> set them appropriately. >> >> >> I've thought for ages that if you want to naturally do linear algebra, >> you need to capture the concept of a row and column vector as distinct >> from each-other and from (1,n) and (n,1) shape arrays. So: It's a pity that these ideas weren't incorporatated into the Numarray implementation.
The treatment of the scalar was also questionable. There's time to fix these things. >> > As a first thought I am against flags. We have dot, and vdot, which > ideally would at some point do stacked matrix-matrix and stacked > vector-vector (albeit vdot does complex conjugation). vector-matrix and > matrix-vector would require the user to use (1, n) or (n, 1) matrices. > If someone can convince me that this is a big deal, flags might be the > only option, though... That's a basic question: Is dot a big deal? Unfortunately, this wasn't examined carefully enough last Spring. > > - Sebastian Colin W. > >> +1 >> >> >> -Chris >> >> >> >> -- >> >> Christopher Barker, Ph.D. >> Oceanographer >> >> Emergency Response Division >> NOAA/NOS/OR&R (206) 526-6959 voice >> 7600 Sand Point Way NE (206) 526-6329 fax >> Seattle, WA 98115 (206) 526-6317 main reception >> >> chris.bar...@noaa.gov >> _______________________________________________ >> NumPy-Discussion mailing list >> NumPy-Discussion@scipy.org >> http://mail.scipy.org/mailman/listinfo/numpy-discussion > > _______________________________________________ > NumPy-Discussion mailing list > NumPy-Discussion@scipy.org > http://mail.scipy.org/mailman/listinfo/numpy-discussion _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion
