Mailman 3 April 2004 - SciPy-User

Re: Scipy help?
by Christopher Fonnesbeck April 27, 2004

April 27, 2004

On Apr 25, 2004, at 1:11 AM, Simon Garrett wrote: > As you can probably see, my installs were all from source tar-balls, if > that makes any difference, downloaded from the sites pointed at by the > Mac/SciPy webpage I mentioned. The setup.py file in the 0.3 release needs to be altered before compiling on OSX. In particular, lines 103 and 104 need to be uncommented in order for a successful build. These lines are uncommented in CVS, but not in the 0.3 source tarball. C. -- Christopher J. Fonnesbeck ( c h r i s @ f o n n e s b e c k . o r g ) Georgia Cooperative Fish & Wildlife Research Unit, University of Georgia "More and more of our imports come from overseas." George W. Bush, 25 September 2000 -- Putting http://wecanstopspam.org in your email helps it pass through overzealous spam filters.

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errorbar plot in gplt
by danny shevitz April 26, 2004

April 26, 2004

Howdy, Can anyone post a simple snippet of code to get a working errorbar plot in gplt? I keep trying things but my machine keeps crashing hard (gnuplot burns 100% cpu). I've been looking at the new_plot code and I can't tell if asymmetric error bars are possible. Does anyone know? Thanks, Danny __________________________________ Do you Yahoo!? Yahoo! Photos: High-quality 4x6 digital prints for 25� http://photos.yahoo.com/ph/print_splash

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Thanks to developers
by Gyro Funch April 26, 2004

April 26, 2004

Hi, I had tried SciPy about a year ago and was unable to install it owing to some incompatibilities with certain libraries (probably Atlas and/or lapack on Redhat Linux 8). I just installed SciPy v0.3 without a hitch. I would like to express my thanks to the SciPy developers for all of their hard work in developing this excellent package. -g

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Instructions for installing SciPy on OSX
by Christopher Fonnesbeck April 26, 2004

April 26, 2004

I have created relatively detailed instructions for installing SciPy on OSX in my member's folder of the new SciPy site, borrowing heavily from Pearu's windows instructions. I have submitted this page for publication to the SciPy gods, so hopefully it will be made available soon. Please let me know if you find any errors or inconsistencies. Chris -- Christopher J. Fonnesbeck ( c h r i s @ f o n n e s b e c k . o r g ) Georgia Cooperative Fish & Wildlife Research Unit, University of Georgia

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Continuous sine wave
by Bob.Cowdery＠CGI-Europe.com April 26, 2004

April 26, 2004

Anyone know the most efficient way to generate a continuous sine wave. What I actually need is single and dual tones at a frequency between 500Hz and 2KHz. This would be packed into an array representing 2048 samples at 44.1KHz sampling rate initially. The block size and sampling rate are variable so I need to be able to stitch blocks together correctly at any size and rate. Thanks Bob Bob Cowdery CGI Senior Technical Architect +44(0)1438 791517 Mobile: +44(0)7771 532138 bob.cowdery(a)cgi-europe.com <mailto:bob.cowdery@cgi-europe.com> *** Confidentiality Notice *** Proprietary/Confidential Information belonging to CGI Group Inc. and its affiliates may be contained in this message. If you are not a recipient indicated or intended in this message (or responsible for delivery of this message to such person), or you think for any reason that this message may have been addressed to you in error, you may not use or copy or deliver this message to anyone else. In such case, you should destroy this message and are asked to notify the sender by reply email.

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Spline interpolation on unevenly spaced grid.
by Nadav Horesh April 25, 2004

April 25, 2004

I am trying to do spline interpolation on arbitrary 2D grids. I followed the tutorial example (p. 22), but it seems to work only on regular grids: >>> from scipy import * >>> from scipy import interpolate as SI >>> x,y = mgrid[-1:1:15j,-1:1:15j] >>> xx = x**1.2 >>> z = exp(-4*(x**2+y**2)) >>> tck = SI.bisplrep(x,y,z) /usr/local/lib/python2.3/site-packages/scipy/interpolate/fitpack.py:611: DeprecationWarning: integer argument expected, got float tx,ty,nxest,nyest,wrk,lwrk1,lwrk2) >>> tck = SI.bisplrep(x,y,z) >>> tck = SI.bisplrep(xx,y,z) >>> ================================ RESTART ================================ **** This is a seg fault 1. Can someone explain the warning message? 2. Is there a method in scipy to do spline interpolation on arbitrary grids? (scipy version: 0.3.0_266.4239) Nadav.

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Fw: no __setitem__ in spmatrix class
by pascal barbedor April 24, 2004

April 24, 2004

Hi I noticed there is no __setitem__ method in spmatrix class in scipy.sparse module but what if one needs to (sparsely) fill the matrix after __init__ time ? thanks

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RPMs of 0.3
by Stephen Walton April 23, 2004

April 23, 2004

I just tried downloading and installing the prebuilt RPMs of SciPy 0.3. They are realy very handy, but of course I have some comments. SciPy-0.3.0_266.4239-1ee_py23_Linux_PIII_rh9.i386.rpm, and perhaps the others, have fftw as a dependency but this is not stated on the installation site. I was able to install them on a non-FFTW-equipped machine by using "--nodeps". Without fftw, scipy.test(level=1) fails. Installing FFTW allows it to pass all tests on FC1 at this level. YMMV. FYI, I find the simplest way to get fftw on FC1 is to put download.fedora.us in /etc/yum.conf and do "yum install fftw fftw-devel". -- Stephen Walton <stephen.walton(a)csun.edu> Dept. of Physics & Astronomy, Cal State Northridge

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scipy.test() hang up
by Nils Wagner April 23, 2004

April 23, 2004

Dear experts, scipy.test() hang up in latest cvs 0.3.1_273.4274. ...Result may be inaccurate, approximate err = 1.60346233901e-11 .............................................Ties preclude use of exact statistic. ..Ties preclude use of exact statistic. ................ Any pointer for this behavior ? Nils

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import scipy mangles types
by John Hunter April 22, 2004

April 22, 2004

Here's an interesting bug. from Matrix import Matrix import scipy Matrix([1,2,3]) produces the traceback Traceback (most recent call last): File "<stdin>", line 1, in ? File "/usr/local/lib/python2.3/site-packages/Numeric/Matrix.py", line 69, in __init__ if type(data) is types.StringType: AttributeError: 'NoneType' object has no attribute 'StringType' The types module (used by Matrix) is being replaced by None if scipy is imported after Matrix. If I import scipy before I import Matrix, I have no troubles import scipy from Matrix import Matrix Matrix([1,2,3]) This is a CVS scipy, circa Feb 10 2004. Haven't checked against 0.3. JDH

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