[Numpy-discussion] Negative indexing.

Nathan Faggian nathan.faggian@gmail....
Sat Jan 14 17:53:52 CST 2012


Hi,

I am finding it less than useful to have the negative index wrapping on nd-arrays. Here is a short example:

import numpy as np
a = np.zeros((3, 3))
a[:,2] = 1000
print a[0,-1]
print a[0,-1]
print a[-1,-1]

In all cases 1000 is printed out. 

What I am after is a way to say "please don't wrap around" and have negative indices behave in a way I choose.  I know this is a standard thing - but is there a way to override that behaviour that doesn't involve cython or rolling my own resampler?

Kind Regards,

Nathan.




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