[Numpy-discussion] differencing numarray arrays.
zingale at ucolick.org
Tue Jul 13 13:42:02 CDT 2004
thanks, all these responses helped. I guess I was still a little
unclear with the slicing abilities in numarray.
On Tue, 13 Jul 2004, Paul Dubois wrote:
> Two of the responses to your question, while correct, might have seemed
> mysterious to a beginner.
> a[1:] - a[:-1]
> is actually shorthand for:
> a[1:, :] - a[:-1, :]
> Or to be even more explicit:
> n = 8
> a[1:n, 0:n] - a[0:(n-1), 0:n]
> If you had wanted the difference in the second index, you have to use
> the more explicit forms.
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