On Wed, Apr 2, 2008 at 4:30 PM, Robert Kern <[EMAIL PROTECTED]> wrote:
> On undefined, Charles R Harris <[EMAIL PROTECTED]> wrote: > > Hi All, > > > > I think it would enhance broadcasting if functions like sum, mean, etc > > didn't change the number of dimensions. For example, suppose one wanted > to > > subtract the mean along dimension 2 from the same axis of the original > > array, then something like > > > > In [44]: a = ones((2,3,4,5)) > > > > In [45]: a -= a.mean(2) > > > > would do the trick. Similar modifications might also suit functions of > the > > argmax, argmin, argsort type and allow a common argtake function that > would > > allow one to take along a specified axis, making easy something that is > > somewhat complicated at the moment. > > > > The main drawback that I see is that scalars would no longer be 0D, but > that > > could be special cased as scalars will broadcast correctly no matter the > > ndim. > > -1 > > I really don't want to see this amount of code breakage, even in 1.1. > Add another keyword argument if you wish, but don't break the current > API. > Apart from that, what do you think of the idea? I currently spend more effort than I like doing newaxis magic. Chuck
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