[Numpy-discussion] arrayfns in numpy?

2007-03-13 Thread Stephen Kelly
Hi, I'm working on a project that requires interpolation, and I found this post (http://mail.python.org/pipermail/python-list/2000-August/050462.html ) which works fine on my linux box (which seems to have Numeric installed), but does not work on my windows platform because the arrayfns module

[Numpy-discussion] problem with installing scipy

2007-03-13 Thread nevin
I am trying to use scipy optimize module but I am having problem when I try to import it: import numpy import scipy from scipy import optimize Traceback (most recent call last): File stdin, line 1, in ? File /Library/Frameworks/Python.framework/Versions/2.4/lib/

[Numpy-discussion] compiling numarrray on Cygwin

2007-03-13 Thread Duhaime Johanne
I have problem to install numarray on cygwin. I have seen emails on that topic but I finally do not have a solution. Below is the error message for numarray-1.5.2 on python 2.4.3. I am using numarray instead of numpy because I need the module to be compatible with a software : MAT

Re: [Numpy-discussion] Teaching Array Languages

2007-03-13 Thread Beliavsky
On Mar 10, 3:30 pm, Steven H. Rogers [EMAIL PROTECTED] wrote: Thanks to all who responded to my question about teaching array programming. I've compiled a brief summary of the responses. Fortran 90 and later versions of the language can be used to teach array programming, since the language

Re: [Numpy-discussion] Teaching Array Languages

2007-03-13 Thread Beliavsky
On Mar 10, 3:30 pm, Steven H. Rogers [EMAIL PROTECTED] wrote: Thanks to all who responded to my question about teaching array programming. I've compiled a brief summary of the responses. Fortran 90 and 95 can and are being used to teach array programming, since the language allows operations

[Numpy-discussion] No module named Numeric for numpy-1.0.1.win32-py2.5.exe on Python 2.5

2007-03-13 Thread Haw-Jye Shyu
Hi folks: How are you? I am a newbie to the Numpy. Today, I have downloaded numpy-1.0.1.win32-py2.5.exe from the web site of http://sourceforge.net/project/showfiles.php?group_id=1369package_id=175103 I double clicked on the numpy-1.0.1.win32-py2.5.exe and the installation seems to run

[Numpy-discussion] Error in running the numpy\setup.py numpy-1.0.1.win32-py2.5.exe with python 2.5

2007-03-13 Thread Haw-Jye Shyu
Hi Folks: On the second try, I use the Python Shell to open a file named C:\Python25\Lib\site-package\numpy\setup.py and run it on the Pythono Shell. I got the following message: Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit (Intel)] on win32 Type copyright, credits or

Re: [Numpy-discussion] in place random generation

2007-03-13 Thread Travis Oliphant
Mark P. Miller wrote: Robert: Just a thought on this topic: Would it be possible for the Scipy folks to add a new module based solely off your old mtrand code (pre-broadcast)? I have to say that the mtrand code from numpy 0.9.8 has some excellent advantages over the core python random

[Numpy-discussion] cannot pickle large numpy objects when memory resources are already stressed

2007-03-13 Thread Glen W. Mabey
Hello, After running a simulation that took 6 days to complete, my script proceeded to attempt to write the results out to a file, pickled. The operation failed even though there was 1G of RAM free (4G machine). I've since reconsidered using the pickle format for storing data sets that

Re: [Numpy-discussion] 0/0 is 0 or nan?

2007-03-13 Thread Christopher Ball
Thank you both for your replies - the difference is clear to me now. Actually, sorry, I'm still confused! If I want to be able to have a/0 be inf (for a!=0), then why does that stop 0/0 from being nan? In Python, a/0 gives a divide-by-zero error for any a, but in numpy, I can ignore

Re: [Numpy-discussion] No module named Numeric for numpy-1.0.1.win32-py2.5.exe on Python 2.5

2007-03-13 Thread Robert Kern
Haw-Jye Shyu wrote: Hi folks: How are you? I am a newbie to the Numpy. Today, I have downloaded numpy-1.0.1.win32-py2.5.exe from the web site of http://sourceforge.net/project/showfiles.php?group_id=1369package_id=175103 I double clicked on the numpy-1.0.1.win32-py2.5.exe and the

Re: [Numpy-discussion] Error in running the numpy\setup.py numpy-1.0.1.win32-py2.5.exe with python 2.5

2007-03-13 Thread Robert Kern
Haw-Jye Shyu wrote: Hi Folks: On the second try, I use the Python Shell to open a file named C:\Python25\Lib\site-package\numpy\setup.py and run it on the Pythono Shell. Don't. It's not useful once installed. It's just for building from source. -- Robert Kern I have come to believe

Re: [Numpy-discussion] 0/0 is 0 or nan?

2007-03-13 Thread Robert Kern
Christopher Ball wrote: In Python, a/0 gives a divide-by-zero error for any a, but in numpy, I can ignore divide-by-zero errors. If I do this, why can't I still have 0/0 be nan? seterr(divide='ignore') a=array([0],dtype=float_) b=array([0],dtype=float_) divide(a,b) gives nan, so why

[Numpy-discussion] 3-10x speedup in bincount()

2007-03-13 Thread Stephen Simmons
Well, there were no responses to my earlier email proposing changes to numpy.bincount() to make it faster and more flexible. Does this mean noone is using bincount? :-) Anyway I've now made the proposed modifications and got substantial speedups of 3-10. Details are in this extract from my C

[Numpy-discussion] efficient norm of a vector

2007-03-13 Thread lorenzo bolla
Hi all, just a quick (and easy?) question. what is the best (fastest) way to implement the euclidean norm of a vector, i.e. the function: import scipy as S def norm(x): normalize a vector. return S.sqrt(S.sum(S.absolute(x)**2)) ? thanks in advance, Lorenzo.

Re: [Numpy-discussion] Problem compiling numpy with Python 2.5 on Powerbook

2007-03-13 Thread Steve Lianoglou
Hi, Hi, guys. I'm trying to install numpy from subversion on my Powerbook 12, from a fresh install (Mac OS X 10.4.8). I downloaded the official universal Python 2.5 from python.org, and installed GCC (powerpc-apple-darwin8-gcc-4.0.0) from XCode. Installation fails with the message:

[Numpy-discussion] Nonblocking Plots with Matplotlib

2007-03-13 Thread Bill Baxter
Howdy Folks, I was missing the good ole days of using Matlab back at the Uni when I could debug my code, stop at breakpoints and plot various data without fear of blocking the interpreter process. Using ipython -pylab is what has been suggested to me in the past, but the problem is I don't do my

Re: [Numpy-discussion] efficient norm of a vector

2007-03-13 Thread Bill Baxter
There is numpy.linalg.norm. Here's what it does: def norm(x, ord=None): x = asarray(x) nd = len(x.shape) if ord is None: # check the default case first and handle it immediately return sqrt(add.reduce((x.conj() * x).ravel().real)) if nd == 1: if ord == Inf: