my array subset method could be improved?
Juho Schultz
juho.schultz at helsinki.fi
Fri Oct 14 09:09:57 EDT 2005
Jim O'D wrote:
> Hi all
>
> I have an array a=array([2,3,1]).
>
> I want to extract an array with all the elements of a that are less than 0.
>
> Method 1.
> new = array([i for i in a if i < 0])
>
> Method 2.
> new = a[nonzero(a<0)]
>
> I'm using Numeric arrays but can't seem to find a function that does this.
>
> Am I missing a more obvious way to do it quickly?
>
> Thanks
>
> Jim
new = Numeric.compress(Numeric.less(a,0),a)
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