# [PYTHON MATRIX-SIG] Re: take() again

**Jim Hugunin
**
hugunin@mit.edu

*Thu, 22 Aug 1996 11:32:56 -0400*

Carlos Fonseca wrote:
...
>* One could always write take(a,[indices]) to get the current behaviour with
*>* axis=2, if indices is 1d. More generally, one could write
*>*
*>* take( a[(ni-1)*(NewAxis,)],indices[(Ellipses,)+ax*(NewAxis,)+(All,)] )
*
You aren't seriously suggesting that people write python code that looks
like this?
I think that everybody could be made happy if I added the following
function to alpha3:
permute(a, permutation)
a and permutation must be aligned for as many axes as there are in
permutation. The elements of a will be resorted according to the
elements of permutation.
ie. permute(a, argsort(a)) <==> sort(a)
I think that with this function and take almost everything that you want
to do with Carlos' fancy take would be possible. I also think that
having two fairly easy to understand functions is a better situation
than having one really complicated one.
Note:
permute(a, indices) <==> take(a, indices)
iff: len(indices) = len(a)
len(indices.shape) = 1
Opinions? - Jim
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