[Numpy-discussion] Efficient scaling of array

Zachary Pincus zachary.pincus@yale....
Mon May 4 10:52:20 CDT 2009


scipy.ndimage.zoom (and related interpolation functions) would be a  
good bet -- different orders of interpolation are available, too,  
which can be useful.

Zach



On May 4, 2009, at 11:40 AM, Johannes Bauer wrote:

> Hello list,
>
> is there a possibility to scale an array by interpolation,
> automatically? For illustration a 1D-example would be an array of size
> 5, which is scaled to size 3:
>
> before: [ 1,   2,   3,   4,   5 ]
>          1/1  2/3
>               1/3  1   1/3
>                        2/3   1
> after : [ 2.33, 5, 7.66 ]
>
>
> The same thing should be possible in nD, with the obvious analogy. Is
> there such a function in numpy?
>
> Kind regards,
> Johannes
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