[Numpy-discussion] np.dot and 'out' bug

[Matthieu Brucher]

Hi,

It's to be expected. You are overwritten one of your input vector while it
is still being used.
So not a numpy bug ;)

Matthieu


2013/5/23 Pierre Haessig <pierre.haessig at crans.org>

> Hi Nicolas,
>
> Le 23/05/2013 15:45, Nicolas Rougier a écrit :
> > if I use either a or b as output, results are wrong (and nothing in the
> dot documentation prevents me from doing this):
> >
> > a = np.array([[1, 2], [3, 4]])
> > b = np.array([[1, 2], [3, 4]])
> > np.dot(a,b,out=a)
> >
> > -> array([[ 6, 20],
> >           [15, 46]])
> >
> >
> > Can anyone confirm this behavior ? (tested using numpy 1.7.1)
> I just reproduced the same weird results with numpy 1.6.2
>
> best,
> Pierre
>
>
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