Hi,
Quick question, I've been doing a fair bit of extension writing in C
recently, but wondered how best to implement:
l = [[]] * 5
to create a list of a given length containing the initialization variable
desired.
A loop seems the straight forward manner, but I would have thought there was
a
Hi,
Don't remember that you are using the same list in each element of the
outer list. If you don't want this, use [[] for i in range(5)]. I
don't think there is another way in C either (or too complicated).
Matthieu
2009/1/26 Hanni Ali hanni@gmail.com:
Hi,
Quick question, I've been
Yes fair point, but when it's a empty list and new elements are replaced
with a new list instance it's fine, especially as [[]]*10 is
significantly faster than [[] for i in xrange(10)] as I was previously
doing.
In fact I think that's partly answered my question [[]]*x must create a list
2009/1/26 Hanni Ali hanni@gmail.com:
Yes fair point, but when it's a empty list and new elements are replaced
with a new list instance it's fine, especially as [[]]*10 is
significantly faster than [[] for i in xrange(10)] as I was previously
doing.
In this case, why do you put a
Hello,
I would like to operate in an easy and efficient way (without python loop) with
arrays of matrices.
Suppose a and b are some arrays of N1*N2 matrices of size 3*3, I would like to
calculate inv_a and dot_ab, which would be arrays of N1*N2 (3*3)-matrices,
such as :
inv_a[i, j] =
On Mon, Jan 26, 2009 at 11:59 PM, Jean-Baptiste Rudant
boogalo...@yahoo.fr wrote:
Hello,
I would like to operate in an easy and efficient way (without python
loop) with arrays of matrices.
Suppose a and b are some arrays of N1*N2 matrices of size 3*3, I would like
to calculate inv_a and
On Mon, Jan 26, 2009 at 10:25 AM, Jean-Baptiste Rudant
boogalo...@yahoo.fr wrote:
Thank you, but my example was bad. I have to deal with matrices which can be
100*100.
De : David Cournapeau courn...@gmail.com
À : Discussion of Numerical Python
What is the most up-to-date way to cite Numpy and Scipy in an academic
journal ?
Cite our conference articles here:
http://conference.scipy.org/proceedings/SciPy2008/index.html
It would be nice if someone involved in the proceedings could post a
bibtex on the citations page. And link the
JH,
Thx for the links, but I'm afraid I need something more basic than
that. For example, I'm referring to Python as:
van Rossum, G. and Drake, F. L. (eds), 2006. Python Reference Manual,
Python Software Foundation,. http://docs.python.org/ref/ref.html.
I could indeed use
@MANUAL{ascher.dubois.hinsen.hugunin.oliphant-1999-np,
author = {Ascher, David and Paul F. Dubois and Konrad Hinsen and James
Hugunin and Travis Oliphant},
year = 1999,
title= {Numerical Python},
edition = {UCRL-MA-128569},
address = {Livermore, CA},
Jean-Baptiste Rudant wrote:
I would like to operate in an easy and efficient way (without python loop)
with arrays of matrices.
Suppose a and b are some arrays of N1*N2 matrices of size 3*3, I would
like to calculate inv_a and dot_ab, which would be arrays of N1*N2
(3*3)-matrices,
On 1/26/2009 12:48 PM Pierre GM apparently wrote:
Shouldn't we refer to the new doc.scipy.org instead of Travis' site ?
Not in my opinion: Travis wrote a book,
which is what is being cited.
The docs link is in fact to the same tramy site.
I must add that IMO, it would be a courtesy
for the
Hi - I am trying to find a string in a list with strings and have come
across the following state of affairs:
In [228]: subjects
Out[228]:
['KAA',
'CCS',
'EJS',
'MNM',
'JHS',
'LJL',
'DVA',
'FCL',
'CNC',
'KFM',
'APM',
'GMC']
In [229]: subjects[0]
Out[229]: 'KAA'
In [230]:
On Mon, Jan 26, 2009 at 13:48, Ariel Rokem aro...@berkeley.edu wrote:
Hi - I am trying to find a string in a list with strings and have come
across the following state of affairs:
In [228]: subjects
Out[228]:
['KAA',
'CCS',
'EJS',
'MNM',
'JHS',
'LJL',
'DVA',
'FCL',
'CNC',
On 1/26/2009 2:37 PM Pauli Virtanen apparently wrote:
Fixed, no need to be dissappointed any more.
Thanks!
Alan
PS I hope disappointed did not sound so strong
as to be discourteous. Email is tricky, and I
tend to write mine with dangerous speed.
___
On Jan 24, 2009, at 6:23 PM, Ryan May wrote:
Ok, thanks. I've dug a little further, and it seems like the
problem is that a
column of all missing values ends up as a column of all None's.
When you create
a (masked) array from a list of None's, you end up with an object
array. On
Pierre GM wrote:
On Jan 24, 2009, at 6:23 PM, Ryan May wrote:
Ok, thanks. I've dug a little further, and it seems like the
problem is that a
column of all missing values ends up as a column of all None's.
When you create
a (masked) array from a list of None's, you end up with an object
Doh! That's embarrassing!
Thanks!
On Jan 26, 2009, at 12:00 PM, Keith Goodman wrote:
On Mon, Jan 26, 2009 at 11:48 AM, Ariel Rokem aro...@berkeley.edu
wrote:
Hi - I am trying to find a string in a list with strings and have
come
across the following state of affairs:
In [228]: subjects
Hi all,
I just wrote ctypes bindings to fftw3 (see
http://projects.scipy.org/pipermail/scipy-user/2009-January/019557.html
for the post to scipy).
Now I have a couple of numpy related questions:
In order to be able to use simd instructions I
create an ndarray subclass, which uses fftw_malloc
Jochen wrote:
Hi all,
I just wrote ctypes bindings to fftw3 (see
http://projects.scipy.org/pipermail/scipy-user/2009-January/019557.html
for the post to scipy).
Now I have a couple of numpy related questions:
In order to be able to use simd instructions I
create an ndarray subclass,
On Mon, 2009-01-26 at 19:25 -0600, Ryan May wrote:
Jochen wrote:
Hi all,
I just wrote ctypes bindings to fftw3 (see
http://projects.scipy.org/pipermail/scipy-user/2009-January/019557.html
for the post to scipy).
Now I have a couple of numpy related questions:
In order to be
Jochen wrote:
On Tue, 2009-01-27 at 12:49 +0900, David Cournapeau wrote:
Jochen wrote:
Hi all,
I just wrote ctypes bindings to fftw3 (see
http://projects.scipy.org/pipermail/scipy-user/2009-January/019557.html
for the post to scipy).
Now I have a couple of numpy related
On Tue, 2009-01-27 at 13:28 +0900, David Cournapeau wrote:
Jochen wrote:
On Tue, 2009-01-27 at 12:49 +0900, David Cournapeau wrote:
Jochen wrote:
Hi all,
I just wrote ctypes bindings to fftw3 (see
http://projects.scipy.org/pipermail/scipy-user/2009-January/019557.html
Jochen wrote:
On Tue, 2009-01-27 at 13:28 +0900, David Cournapeau wrote:
Jochen wrote:
On Tue, 2009-01-27 at 12:49 +0900, David Cournapeau wrote:
Jochen wrote:
Hi all,
I just wrote ctypes bindings to fftw3 (see
On Tue, 2009-01-27 at 13:54 +0900, David Cournapeau wrote:
Jochen wrote:
On Tue, 2009-01-27 at 13:28 +0900, David Cournapeau wrote:
Jochen wrote:
On Tue, 2009-01-27 at 12:49 +0900, David Cournapeau wrote:
Jochen wrote:
Hi all,
I just wrote
Jochen wrote:
On Tue, 2009-01-27 at 13:54 +0900, David Cournapeau wrote:
Jochen wrote:
On Tue, 2009-01-27 at 13:28 +0900, David Cournapeau wrote:
Jochen wrote:
On Tue, 2009-01-27 at 12:49 +0900, David Cournapeau wrote:
Jochen
On Tue, 2009-01-27 at 14:46 +0900, David Cournapeau wrote:
Jochen wrote:
On Tue, 2009-01-27 at 13:54 +0900, David Cournapeau wrote:
Jochen wrote:
On Tue, 2009-01-27 at 13:28 +0900, David Cournapeau wrote:
Jochen wrote:
On Tue, 2009-01-27 at
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