On Thu, Nov 22, 2012 at 4:17 AM, Fernando Perez fperez@gmail.com wrote:
Hi folks,
years ago, John Hunter and I bought the py4science.{com, org, info}
domains thinking they might be useful. We never did anything with
them, and with his passing I realized I'm not really in the mood to
On Wed, 2012-11-21 at 22:58 -0500, josef.p...@gmail.com wrote:
On Wed, Nov 21, 2012 at 10:35 PM, Charles R Harris
charlesr.har...@gmail.com wrote:
On Wed, Nov 21, 2012 at 7:45 PM, josef.p...@gmail.com wrote:
On Wed, Nov 21, 2012 at 9:22 PM, Olivier Delalleau sh...@keba.be wrote:
Dear all,
if I have two ndarray arr1 and arr2 (with the same shape), is there some
difference when I do:
arr = arr1 + arr2
and
arr = np.add(arr1, arr2),
and then if I have more than 2 arrays: arr1, arr2, arr3, arr4, arr5, then I
cannot use np.add anymore as it only recieves 2 arguments.
then
On Thu, Nov 22, 2012 at 12:41 PM, Chao YUE chaoyue...@gmail.com wrote:
Dear all,
if I have two ndarray arr1 and arr2 (with the same shape), is there some
difference when I do:
arr = arr1 + arr2
and
arr = np.add(arr1, arr2),
and then if I have more than 2 arrays: arr1, arr2, arr3, arr4,
On 11/22/12 1:41 PM, Chao YUE wrote:
Dear all,
if I have two ndarray arr1 and arr2 (with the same shape), is there
some difference when I do:
arr = arr1 + arr2
and
arr = np.add(arr1, arr2),
and then if I have more than 2 arrays: arr1, arr2, arr3, arr4, arr5,
then I cannot use np.add
On Thu, Nov 22, 2012 at 7:14 AM, Sebastian Berg
sebast...@sipsolutions.net wrote:
On Wed, 2012-11-21 at 22:58 -0500, josef.p...@gmail.com wrote:
On Wed, Nov 21, 2012 at 10:35 PM, Charles R Harris
charlesr.har...@gmail.com wrote:
On Wed, Nov 21, 2012 at 7:45 PM, josef.p...@gmail.com wrote:
On Thu, Nov 22, 2012 at 3:54 PM, josef.p...@gmail.com wrote:
Why don't operations on empty arrays not return empty arrays?
Because functions like mean or std are expected to return a scalar.
Functions that are piecewiese can (and should) return an empty array,
but not the mean.
On Thu, 2012-11-22 at 16:05 +0100, Daπid wrote:
On Thu, Nov 22, 2012 at 3:54 PM, josef.p...@gmail.com wrote:
Why don't operations on empty arrays not return empty arrays?
Because functions like mean or std are expected to return a scalar.
Functions that are piecewiese can (and should)
On Thu, Nov 22, 2012 at 10:15 AM, Sebastian Berg
sebast...@sipsolutions.net wrote:
On Thu, 2012-11-22 at 16:05 +0100, Daπid wrote:
On Thu, Nov 22, 2012 at 3:54 PM, josef.p...@gmail.com wrote:
Why don't operations on empty arrays not return empty arrays?
Because functions like mean or std
Thanks for the explanations. Yes, what I am thinking is basically the same
but I didn't test the time.
I never try numexpr, but it would be nice to try it.
Chao
On Thu, Nov 22, 2012 at 3:20 PM, Francesc Alted franc...@continuum.iowrote:
On 11/22/12 1:41 PM, Chao YUE wrote:
Dear all,
if
Examples,
In [13]: ones(()).flags.writeable
Out[13]: True
In [14]: (-ones(())).flags.writeable
Out[14]: False
In [15]: (-1*ones(())).flags.writeable
Out[15]: False
In [16]: (1 + ones(())).flags.writeable
Out[16]: False
In [17]: array(1)
Out[17]: array(1)
In [18]: array(1).shape
Out[18]: ()
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