[Numpy-discussion] Thoughts for 1.1

Robert Kern robert.kern@gmail....
Wed Apr 2 17:30:49 CDT 2008

On undefined, Charles R Harris <charlesr.harris@gmail.com> 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.


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

Robert Kern

"I have come to believe that the whole world is an enigma, a harmless
enigma that is made terrible by our own mad attempt to interpret it as
though it had an underlying truth."
 -- Umberto Eco

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