Hi
I hope the title of this message indicates my question. I am looking
for basic
array functionality in Python and it turns out that there are all these
packages which
are somehow related. Some are allegedly discontinued but still seem to
get updated. Could we start a discussion about which package will or
may or should survive ?
I started to use numarray, but I have a bug that I just cannot find a
solution for, so I started
to look around again. Basically I want to provide scripting support to
a graphics engine. All the
matrices and vectors are in C++ and all I want to do is provide an
interface to python. As a matter of fact, all of the matrix
multiplication etc, could remain in the native C++ code, but I need a
way to extend the python language with the array data type and somehow
intercept operator calls such as *,+,- ....
How is that done in the current libraries... Thx for any help.
Cheers
Jochen
Jan 21 '06
22  2005 
Sébastien Boisgérault wrote: Robert Kern wrote:
Sébastien Boisgérault wrote:
By the way, I tried numpy 0.9.4 10 minutes ago and guess
what ? 'eigenvalue' is broken too ... (hangs forever)
On what platform?
Linux, Mandriva 2006 (gcc 4.0.1, etc.)
Okay, my answer then is, "Don't use gcc 4." gcc 4 broke enough other projects
that I don't feel too bad about saying that. In the meantime, can you try the
workaround that Greg Landrum suggested?
Also, we are using Trac now to manage numpy, so please submit tickets here: http://projects.scipy.org/scipy/numpy/
Thanks!
--
Robert Kern ro*********@gma il.com
"In the fields of hell where the grass grows high
Are the graves of dreams allowed to die."
-- Richard Harter gr**********@gm ail.com wrote: Robert Kern wrote: Sébastien Boisgérault wrote:
By the way, I tried numpy 0.9.4 10 minutes ago and guess
what ? 'eigenvalue' is broken too ... (hangs forever)
On what platform? Are you linking against an optimized BLAS? We can't fix
anything without details. I'll be happy to work with you on this bug over on the
numpy-discussion list.
This is a guess, but the original poster is probably using one of the
newer (3.4.x or 4.0.x) versions of gcc. This is a known problem:
https://bugzilla.redhat.com/bugzilla....cgi?id=138791
(that's one of the applicable bug reports).
A workaround to this problem is to add the option '-ffloat-store' to
your CFLAGS.
Great ! It works :)
Thank you greg !
SB
<insert "gcc 4.0 is such a disaster" rant here>
-greg
Robert Kern wrote: Sébastien Boisgérault wrote: Robert Kern wrote:
Sébastien Boisgérault wrote:
By the way, I tried numpy 0.9.4 10 minutes ago and guess
what ? 'eigenvalue' is broken too ... (hangs forever)
On what platform?
Linux, Mandriva 2006 (gcc 4.0.1, etc.)
Okay, my answer then is, "Don't use gcc 4." gcc 4 broke enough other projects
that I don't feel too bad about saying that.
You certainly should not feel bad about that. Matlab does not support
anything
more recent than gcc 3.3 -- and specifically Simulink S-Functions do
not work
when compiled with gcc 3.4.x or 4.0.x.
In the meantime, can you try the
workaround that Greg Landrum suggested?
I tried it, it works :)
Also, we are using Trac now to manage numpy, so please submit tickets here:
ok.
http://projects.scipy.org/scipy/numpy/
Thanks!
--
Robert Kern
ro*********@gma il.com
"In the fields of hell where the grass grows high
Are the graves of dreams allowed to die."
-- Richard Harter This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
by: Colin J. Williams |
last post by:
numarray is a package which is under development and intended to replace
Numeric, an efficient and operational package.
One of the classes in numarray is NumArray. As currently implemented,
instances of this class are instantiated using factory functions. This
appears to restrict the sub-classing of NumArray
Examples: a sub-class Matrix, an array restricted to two dimensions, or
a sub-class Mix, which combines the NumArray with...
|
by: Marc Schellens |
last post by:
Following the NumPy documentation, I took over some C code,
but run into an error.
Does anybody have a suggestion?
Thanks,
marc
gdlpython.cpp:225: `PyArray_Type' undeclared (first use this function)
#include <python2.3/Python.h>
|
by: grv |
last post by:
So it is supposed to be very fast to have an array of say 5 million
integers stored in a binary file and do
a = numarray.fromfile('filename', (2, 2, 2))
numarray.add(a, 9, a)
but how is that faster than reading the entire file into memory and then
having a for loop in C:
(loop over range) {
*p++ += 9 }
|
by: Bryan |
last post by:
hi,
what is the difference among numeric, numpy and numarray? i'm going to start
using matplotlib soon and i'm not sure which one i should use.
this page says, "Numarray is a re-implementation of an older Python array module
called Numeric"
http://www.stsci.edu/resources/software_hardware/numarray
|
by: robert |
last post by:
just a note - some speed comparisons :
0.60627370238398726
0.42836673376223189
0.36965815487747022
0.016557970357098384
0.15692469294117473
0.01951756438393204
| | |
by: Christian Convey |
last post by:
I need to bang out an image processing library (it's schoolwork, so I
can't just use an existing one). But I see three libraries competing
for my love: numpy, numarray, and numeric.
Can anyone recommend which one I should use? If one is considered the
officially blessed one going forward, that would be my ideal.
Thanks,
Christian
|
by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
|
by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
|
by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
|
by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
|
by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
| | |
by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
|
by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
|
by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
|
by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
| | |
