[SciPy-User] creating a view of an array

[Martin van Leeuwen]

Hi Mathieu,

You can index using a tuple too, like:

a[:,(0,2)]

That way you can index into any columns.

Martin

2011/7/30 mathieu lacage <mathieu.lacage at alcmeon.com>:
> hi,
>
> Let's say I have a big large array:
>
> a = numpy.empty((10000*1000,10))
>
> and I want to create a view of that array to be able to process a subset of
> its data without making a copy.
>
> One column:
> b = a[:,1]
>
> Two adjacent columns:
> b = a[:,1:2]
>
> Can I do the same (no memory allocation) for two columns that are not
> adjacent ? i.e. if I want to create an array that is a view for the 1st and
> 3rd columns.
>
>
> Mathieu
>
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