On Thu, Jan 8, 2015 at 6:13 PM, Rustom Mody <rustompm...@gmail.com> wrote:
> With that I came up with the expression
>
> transpose(array([list(roll(mat[:,i],i,0)) for i in range(mat.shape[1])]))
>
> Not exactly pretty.
> My hunch is it can be improved??...
Hmm, you could use the column_stack constructor to avoid having to
transpose the array.
>>> np.column_stack(np.roll(mat[:,i],i,0) for i in range(mat.shape[1]))
array([[ 1, 38, 33, 28, 23, 18],
[ 7, 2, 39, 34, 29, 24],
[13, 8, 3, 40, 35, 30],
[19, 14, 9, 4, 41, 36],
[25, 20, 15, 10, 5, 42],
[31, 26, 21, 16, 11, 6],
[37, 32, 27, 22, 17, 12]])
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