Mailman 3 August 2002 - SciPy-User

Matlab function detrend
by Nils Wagner 14 Aug '02

14 Aug '02

Hi, I am looking for the Matlab function detrend. Is there such a thing in scipy ? Nils

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detrend
by Nils Wagner 14 Aug '02

14 Aug '02

Hi, detrend works here for signal.detrend(arange(128.),-1,'linear') but >>> signal.detrend(arange(129.),-1,'linear') dgelss:lwork=134 Traceback (most recent call last): File "<stdin>", line 1, in ? File "/usr/local/lib/python2.1/site-packages/scipy/signal/signaltools.py", line 1107, in detrend coef,resids,rank,s = linalg.lstsq(A,newdata[sl]) File "/usr/local/lib/python2.1/site-packages/scipy/linalg/basic.py", line 277, in lstsq overwrite_b = overwrite_b) flapack.error: (lwork>=3*minmn+MAX(2*minmn,MAX(maxmn,nrhs))) failed for 2nd keyword lwork >>> For what reason is lwork=134 ? Nils

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Matlab function cumtrapz
by Nils Wagner 13 Aug '02

13 Aug '02

Hi, I am also looking for the Matlab function cumtrapz. Is there such a thing in scipy ? Nils

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Scientific data - Reading files
by Nils Wagner 12 Aug '02

12 Aug '02

Hi, I have collected acceleration data by a multi-channel data acquisition system. Each file (E1431A*.DAT) contains one column with real numbers. The contents of the i-th file should be stored in the i-th row of a data matrix A. How can I manage this task efficiently ? Are there suitable python modules for this purpose ? A small example would be appreciated. Nils

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Error accessing your website
by Kathy Phillips 10 Aug '02

10 Aug '02

On Sat Aug 10, 2002 at 04:42:02 AM EDT I was unable to reach your web site: http://www.scipy.net/mailman/listinfo/scipy-user due to the following error: Host Not Found As of Sat Aug 10, 2002 at 10:36:47 AM EDT I am able to access your web site again. I work for InternetSeer. InternetSeer, a Web site monitoring company, is conducting an ongoing study of web connectivity. As recommended by the Robots Guidelines, this email is being sent to explain our research activities and to let you know about the difficulty in connecting to your site. The error listed above was initially detected by our primary site monitor in Philadelphia, Pa. then verified by our secondary site monitor located in Los Angeles, Ca. before this error event was recorded. InternetSeer is the largest FREE web site monitoring company in the world. We provide free web site monitoring to over 1 million users worldwide. We'll monitor your web site every hour, 7 days a week, 24 hours a day for free. To have InternetSeer monitor your web site for free, click here for instant signup: http://scclick.internetseer.com/sitecheck/clickthrough.jsp?I5s57g5f5f5i5i5m… As part of your free web site monitoring, you'll receive immediate notifications when we encounter problems accessing your web site and weekly performance reports. InternetSeer does not store or publish the content of your pages, but rather uses availability and link information for our research. There is no need to cancel because InternetSeer will never contact you again at this email address: scipy-user(a)scipy.net. If you have other email addresses that you would like excluded from potential future contact, <a href="http://scclick.internetseer.com/sitecheck/cancelemails.jsp">click here</a> to have those email addresses excluded from our system. Click here to learn more about InternetSeer. http://scclick.internetseer.com/sitecheck/clickthrough.jsp?I5s57g5f5f5i5i5m… Sincerely, Kathy Phillips Web Site Analyst http://www.internetseer.com/ep/setoc?NR5p764lad5aP5q5eMNNV5cSHVMU5bGxy=e3 ---------------------------------------------------------------------------------- As stated above, there is no need to cancel since YOU WILL NEVER be contacted again at scipy-user(a)scipy.net, but you may <a href="http://scclick.internetseer.com/sitecheck/cancel.jsp?xRXy7Mdto59WWVz5vz_SNK…">click here</a>, for a removal confirmation from our website or simply reply to this message with the word "cancel" in the subject line. ##scipy-user(a)scipy.net## SRC=46

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Hey!
by graphicart＠cox.net 09 Aug '02

09 Aug '02

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ADV: Harvest lots of E-mail addresses quickly !
by emailharvest＠email.com 08 Aug '02

08 Aug '02

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CVS compressed checkout fix.
by Joe Cooper 08 Aug '02

08 Aug '02

Hello all, I just wanted to let folks know that the problems that some users had with checkouts using the -z7 flag from the scipy.org CVS server should now be resolved. If anyone continues to see problems, please let me know. I'll be maintaining the SciPy CVS server and the mailing lists for the foreseeable future, so if you run into any technical problems with either feel free to let me know. Thanks. -- Joe Cooper <joe(a)enthought.com>

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plt.image: zoom too far?
by finnefro＠sas.upenn.edu 07 Aug '02

07 Aug '02

Hi all, Has anyone had trouble using plt.image and zooming in too far? The symptoms are either using all available memory (Linux, > 400MB) or showing a blank white window (Linux, Windows). Example: >>> import gui_thread >>> <Importing wxPython... done.> >>> from scipy import * >>> from scipy import plt >>> img = plt.lena() >>> plt.image(img) 1. Use the mouse, zoom in on the eye near the center of the image. (In linux, python's memory usage peaks and then returns to original value.) 2. Now, zoom in closer using the mouse so that just the iris and pupil would be shown. (In linux, memory usage rises to > 400MB and this disk starts swapping. In Windows, the image is not rendered but instead a white canvas is shown.) Same results can be obtained on the command-line: >>> z=plt.image(img) >>> z.x_axis.bounds = [245,250] >>> z.y_axis.bounds = [245,250] >>> z.update() Is this a known bug? Should I be posting to scipy-devel instead? Thanks, Adam

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call plt.image from a wx GUI?
by finnefro＠sas.upenn.edu 06 Aug '02

06 Aug '02

Hi all, I have a GUI that uses wxWindows. Following the tutorial, I've been starting it like: >>> import gui_thread <Importing wxPython... done.> >>> import wxCCD >>> proxy_class = gui_thread.register(wxCCD.MainWindow) >>> win = proxy_class() Now the GUI starts without tying up the command line. I'd like the GUI to display some data in another window, so it calls plt.image(scaled_data,None,None,colormap,'no') which hangs. A simple call to plt.plot([1,2,3],[4,5,6]) does that same. (Note: plt.image, plt.plot work fine from the command line, even with the wx GUI running.) Is there a good way to call the plt functions from within a wx GUI? Thanks, Adam scipy cvs_version = (1,105,1464,3694) Python 2.2.1 Redhat 7.3

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