On Thursday 03 July 2008 15:53, Brain Stormer wrote:
> I am using numpy to create an array then filling some of the values
> using a for loop, I was wondering if there is way to easily fill
> the values without iterating through sort of like
> "array.fill[start:stop,start:stop]"? The reason for my question
> is, in some cases, I might have to fill hundreds (within a
> 10,000x10,000 matrix) of values and I am not sure if iteration is
> the right way to go.
You can do it this way:
>>> from numpy import *
>>> m = zeros((5,5), int)
>>> m[1:4, 1:4] = 1
>>> m
array([[0, 0, 0, 0, 0],
[0, 1, 1, 1, 0],
[0, 1, 1, 1, 0],
[0, 1, 1, 1, 0],
[0, 0, 0, 0, 0]])
HTH, Eike.
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