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

Pierre Haessig pierre.haessig at crans.org
Thu May 23 10:16:26 EDT 2013


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

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 900 bytes
Desc: OpenPGP digital signature
URL: <http://mail.python.org/pipermail/numpy-discussion/attachments/20130523/6722f4d0/attachment.sig>


More information about the NumPy-Discussion mailing list