Just to point out another solution to change the sign:
>>> arr *= -1
Both solutions take the same time on my computer. However, the boolean
equivalent:
>>> arr ^= True
is a lot slower than using negative.
My two cents ...
--
Dr. Barbier de Reuille, Pierre
Institute of Plant Sciences
Altenb
On Sat, Aug 30, 2014 at 1:45 PM, Nathaniel Smith wrote:
> On Sat, Aug 30, 2014 at 6:43 PM, wrote:
> > Is there a way to negate a boolean, or to change the sign of a float
> inplace
> > ?
>
> np.logical_not(arr, out=arr)
> np.negative(arr, out=arr)
>
Thanks Nathaniel.
np.negative might save a
On Sat, Aug 30, 2014 at 7:39 PM, Benjamin Root wrote:
> Random thoughts are the best kinds of thoughts! I didn't even know there was
> a np.negative() function!
Me neither, I had to look it up :-)
-n
--
Nathaniel J. Smith
Postdoctoral researcher - Informatics - University of Edinburgh
http://v
Random thoughts are the best kinds of thoughts! I didn't even know there
was a np.negative() function! I will keep this card up my sleeve at work
for one of those save-the-day moments in optimization.
Cheers!
Ben Root
On Sat, Aug 30, 2014 at 1:45 PM, Nathaniel Smith wrote:
> On Sat, Aug 30, 20
On Sat, Aug 30, 2014 at 6:43 PM, wrote:
> Is there a way to negate a boolean, or to change the sign of a float inplace
> ?
np.logical_not(arr, out=arr)
np.negative(arr, out=arr)
-n
--
Nathaniel J. Smith
Postdoctoral researcher - Informatics - University of Edinburgh
http://vorpus.org
Is there a way to negate a boolean, or to change the sign of a float
inplace ?
Josef
random thoughts
___
NumPy-Discussion mailing list
NumPy-Discussion@scipy.org
http://mail.scipy.org/mailman/listinfo/numpy-discussion
