[SciPy-user] inverse of column_stack
Nils Wagner
nwagner at mecha.uni-stuttgart.de
Tue Feb 21 09:58:09 EST 2006
Ryan Krauss wrote:
>Is there an inverse function to column_stack? i.e. I want to iterate
>over the columns of a matrix. I could first transpose it and then
>call tolist, but I was wondering if there was some clean, fast, built
>in way that I wasn't aware of.
>
>Thanks,
>
>Ryan
>
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>
>>> a = rand(4*3)
>>> a
array([ 0.45210275, 0.45554869, 0.27096599, 0.72289623, 0.28874549,
0.60064951, 0.36406786, 0.97709256, 0.68812732, 0.73081783,
0.07033917, 0.50299293])
>>> a = transpose(reshape(a,(4,3)))
>>> a
array([[ 0.45210275, 0.72289623, 0.36406786, 0.73081783],
[ 0.45554869, 0.28874549, 0.97709256, 0.07033917],
[ 0.27096599, 0.60064951, 0.68812732, 0.50299293]])
Nils
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