[Numpy-discussion] Upgrading from numpy 0.9.7.2416 to 0.9.9.2683

Travis Oliphant oliphant.travis at ieee.org
Tue Jun 27 13:19:59 CDT 2006


Keith Goodman wrote:
> This works in numpy 0.9.7.2416 but doesn't work in numpy 0.9.9.2683:
>
> Numpy 0.9.9.2683
>
> x = asmatrix(zeros((3,2), float))
> y = asmatrix(rand(3,1))
> y
>
> matrix([[ 0.49865026],
>        [ 0.82675808],
>        [ 0.30285247]])
>
> x[:,1] = y > 0.5
> x
>
> matrix([[ 0.,  0.],
>        [ 0.,  0.],  <--- this should be one (?)
>        [ 0.,  0.]])
>
>   

This looks like a bug, probably introduced recently during the re-write 
of the copying and casting code.    Try checking out the revisions r2662 
and r2660 to see which one works for you.  I'll look into this problem.

-Travis





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