On Sun, Aug 17, 2008 at 9:15 PM, Robert Kern <[EMAIL PROTECTED]> wrote:
> On Sun, Aug 17, 2008 at 21:55, Anne Archibald <[EMAIL PROTECTED]> > wrote: > > 2008/8/17 Robert Kern <[EMAIL PROTECTED]>: > >> > >> I suggested that we move it to a branch for the time being so we can > >> play with it and come up with examples of its use. If you have > >> examples that you have already written, I would love to see them. I, > >> for one, am amenable to seeing this in 1.2.0, but only if we push back > >> the release by at least a few weeks. > > > > This is not a worked example, but this is exactly what is needed to > > make possible the "arrays of matrices" functions that were discussed > > some time ago. For example, users frequently want to do something like > > multiply an array of matrices by an array of matrices; that is not > > currently feasible without a very large temporary array (or a loop). > > > > But I think you were looking for examples of code using the interface, > > to see whether it worked well. > > I'll take what I can get. In order of increasing utility: > > 1. Descriptions of use cases (as above). It is also possible to do sums, cumulative sums, and other such things. A generalization of the proposed ufuncs useful for these sorts of things would be mixed type arguments, which would also help in implementing such things as argsort and casting. This requires a different kind of infrastructure for defining and looking up the ufuncs, but I don't think of this as a complication, but rather a simplification as it would allow us to make good use of the code generator and introduce a certain uniformity to the implementation of numpy. Uniformity is good. Chuck
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