On Mon, 2014-03-03 at 22:26 +0100, Eelco Hoogendoorn wrote:
The tuple gets cast to an ndarray; which invokes a different codepath than the scalar addition.
Somehow, numpy has gotten more aggressive at upcasting to float64 as of 1.8, but I havnt been able to discover the logic behind it either
There were changes in the casting logic in 1.7, I think. I can't really remember changes after that, so if there is a change, we might want to check it out. (Or I am just missing something completly :)) - Sebastian
On Mon, Mar 3, 2014 at 10:06 PM, Nicolas Rougier <Nicolas.Rougier@inria.fr> wrote:
Hi all,
I'm using numpy 1.8.0 (osx 10.9, python 2.7.6) and I can't understand dtype promotion in the following case:
>>> Z = np.zeros((2,2),dtype=np.float32) + 1 >>> print Z.dtype float32
>>> Z = np.zeros((2,2),dtype=np.float32) + (1,1) >>> print Z.dtype float64
Is this the expected behavior ? What it the difference between the two lines ?
Nicolas _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion
_______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion