Oops, I just now noticed that it was (1,1) and not (1.1). I really need to set a better font that makes the period and the comma more different...
Ben Root On Mon, Mar 3, 2014 at 5:12 PM, Nicolas Rougier <[email protected]>wrote: > > > I never noticed this kind of cast before (1.8.0), it's just a bit > surprising. > > It was convenient to write translations (for a bunch of points) such as: > > Z = np.ones((n,2),dtype=np.float32) + (300,300) > > but I can live with Z += 300,300 > > > Nicolas > > > On 03 Mar 2014, at 23:02, Benjamin Root <[email protected]> wrote: > > > IIRC, this is dependent on whether you are using 32bit versus 64bit > numpy. All regular integer numbers can fit in 32 bits (is that right?), but > the 1.1 is treated as a float32 if on a 32 bit NumPy or as float64 if on a > 64 bit NumPy. > > > > That's my stab at it. > > > > Ben Root > > > > > > On Mon, Mar 3, 2014 at 4:06 PM, Nicolas Rougier < > [email protected]> 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 > > [email protected] > > http://mail.scipy.org/mailman/listinfo/numpy-discussion > > > > _______________________________________________ > > NumPy-Discussion mailing list > > [email protected] > > http://mail.scipy.org/mailman/listinfo/numpy-discussion > > _______________________________________________ > NumPy-Discussion mailing list > [email protected] > http://mail.scipy.org/mailman/listinfo/numpy-discussion >
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