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From: John H. <jdh...@ac...> - 2005-05-14 21:05:24
|
>>>>> "Florian" == Florian Lindner <mai...@xg...> writes:
Florian> Am Freitag, 13. Mai 2005 18:49 schrieb John Hunter:
>> >>>>> "Florian" == Florian Lindner <mai...@xg...>
>> writes:
>>
Florian> No. I pasted the complete script into the mail. There is
Florian> nothing else I execute...
>> Please post the following commands, or their equivalent for
>> your platform, and their output. Please include the commands
>> you actually type in your post.
>>
>> > cat test.py > /usr/bin/python2.4 ./test.py --verbose-helpful
Florian> Here we go:
Well, I'll be damned. I really can't believe this hasn't cropped up
before -- it's a real bug.
The errant code is in matplotlib/backends/__init___.py
# Import the requested backend into a generic module object
backend_name = 'backend_'+backend.lower()
backend_mod = __import__('matplotlib.backends.'+backend_name,
globals(),locals(),[backend_name])
Where the default backend is being imported. These changes were
introduced many moons ago by Fernando when he was cleaning up the
backend import for ipython/pylab. Then need top be moved to a
function or otherwise deferred until pylab asks for them, to prevent
the kind of problem you are seeing.
As a workaround, add these two lines at the top of your script:
import matplotlib
matplotlib.use('Agg')
or change the default backend in the rc file to 'Agg'. Even though
there are 2 good workarounds, I still consider this to be a little bug,
because the OO interface shouldn't be doing any magic like importing a
backend implicitly. Would you be willing to file a bug report on the
sourceforge site?
Thanks,
JDH
|
|
From: Ryan K. <rya...@co...> - 2005-05-14 19:50:48
|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type"> <title></title> </head> <body bgcolor="#ffffff" text="#000000"> <div class="moz-text-html" lang="x-western"> <div class="moz-text-flowed" style="font-family: -moz-fixed; font-size: 12px;" lang="x-western">Is there a quick and easy way to plot the columns of a matrix versus a vector and get different color lines for each column? If I try <br> <br> In [50]: shape(timevector) <br> Out[50]: (21001, 1) <br> <br> In [51]: shape(datamatrix) <br> Out[51]: (21001, 3) <br> <br> In [52]: plot(timevector,datamatrix) <br> I get: <br> RuntimeError: xdata and ydata must be the same length <br> <br> In matlab, this would give me 3 diffent color lines, one for each column of datamatrix. <br> <br> plot(timevector,datamatrix[:,i]) works just fine for one line<br> <br> Do I need to define a matrix plotting function like<br> <br> def matrixplot(xvect,ymat): <br> ioff() <br> for i in range(shape(ymat)[1]): <br> plot(xvect,ymat[:,i]) <br> show() <br> ion() <br> <br> or is there an easier/faster way?<br> <br> Ryan <br> <br> <br> <br> <br> </div> </div> </body> </html> |
|
From: Robert K. <rk...@uc...> - 2005-05-14 19:20:03
|
Vidar Gundersen wrote: > another question: there are many GTK+ initiatives for Mac OS X. > are there any GTK that runs natively on Mac, that would work > with PyGTK and matplotlib? (not depending on X11.) > > GTK+ for Quartz > <URL: http://gtk-quartz.sourceforge.net/ > > > Gtk+-Cocoa -- Gtk for Mac OS X > <URL: http://gtk-cocoa.sourceforge.net/ > > > GTK+OSX Project > <URL: http://gtk-osx.sourceforge.net/ > My understanding is that none of these are anywhere near the stability and completeness they need to be for matplotlib (or even PyGTK I believe). X11 is your only solution for PyGTK on OS X. -- Robert Kern rk...@uc... "In the fields of hell where the grass grows high Are the graves of dreams allowed to die." -- Richard Harter |
|
From: Vidar G. <vid...@37...> - 2005-05-14 18:19:57
|
===== Original message from Darren Dale | Sat, 14 May 2005: > PyGTK-2.6.2 just fixed a few bugs, according to their website. Some more > information would be helpful: What error messages are reported by Matplotlib? "The procedure entry point gdk_pxbuf_savev_utf8 could not be located in the dynamic link library libgdk_pixbuf-2.0.0.dll." my PyGTK was installed from the Windows binary distribution with installer file name "pygtk-2.6.2-1.win32-py2.4.exe", compiled on May 10. another question: there are many GTK+ initiatives for Mac OS X. are there any GTK that runs natively on Mac, that would work with PyGTK and matplotlib? (not depending on X11.) GTK+ for Quartz <URL: http://gtk-quartz.sourceforge.net/ > Gtk+-Cocoa -- Gtk for Mac OS X <URL: http://gtk-cocoa.sourceforge.net/ > GTK+OSX Project <URL: http://gtk-osx.sourceforge.net/ > -- Vidar Bronken Gundersen |
|
From: Darren D. <dd...@co...> - 2005-05-14 16:37:32
|
Hi Vidar, On Saturday 14 May 2005 12:24 pm, Vidar Gundersen wrote: > updating to PyGTK 2.6.2, my matplotlib installation stopped working. > is this correct? are there a fix for it? downgrade PyGTK? PyGTK-2.6.2 just fixed a few bugs, according to their website. Some more=20 information would be helpful: What error messages are reported by Matplotli= b?=20 Darren |
|
From: Vidar G. <vid...@37...> - 2005-05-14 16:23:56
|
updating to PyGTK 2.6.2, my matplotlib installation stopped working. is this correct? are there a fix for it? downgrade PyGTK? -- Vidar Bronken Gundersen |
|
From: Nicolas G. <hu...@ya...> - 2005-05-14 11:54:52
|
from pylab import *
x = arange(100)
plot(x)
xlim(20,30)
savefig('im1.eps')
savefig('im2.svg')
open this files in inkscape and a pb appeared. The
line trace goes from outside the limit gave in the
script. This files can't be use like this in any other
software who can edit vectoriel format.
Another problem is the size of this files who are far
too big. I don't know how to change it. In a bitmap
file like png file or jpg that doesn't matter because
the pixel are just overlay but we loose the interest
to have a vectoriel format. One solution is that the
user cut himself is plot but it's not the good way (I
think).
Thanks for matplotlib, I continue to convert some
people around me to use it. It's not difficult, I just
have to show them the quality of the plot :)
N.
_____________________________________________________________________________
Découvrez le nouveau Yahoo! Mail : 1 Go d'espace de stockage pour vos mails, photos et vidéos !
Créez votre Yahoo! Mail sur http://fr.mail.yahoo.com
|
|
From: Sean G. <sgi...@fr...> - 2005-05-14 03:34:27
|
Ted, You mean to do stuff like this: http://zcologia.net/files/mars_topo.jpg ? :) I simply downloaded the most coarse MOLA topography, read it with GDAL, and warped it to an orthographic projection (0 latitude, 0 longitude). GDAL has a SWIG-generated Python module that could be used from pylab. The recipe for this example is at http://zcologia.com/news/39. cheers, Sean On May 13, 2005, at 5:27 PM, Ted Drain wrote: > Very cool! > > At some point in the future we'll be interested in modifying/extending > the basemap module to allow other data sets. In particular, we're > going to need to do maps of Mars using the Mars laser altimeter > database (MOLA). > > http://pds-geosciences.wustl.edu/missions/mgs/megdr.html > > I wonder if the ability use GIS data sets could be worked in at the > same time using some type of common architecture? > > Ted > > At 12:34 PM 5/13/2005, Sean Gillies wrote: >> On May 13, 2005, at 1:26 PM, Jeff Whitaker wrote: >> >>> >>> I just added the orthographic projection to the basemap toolkit - >>> you can now make really nifty pseudo-satellite views of global data. >>> >>> Here's an example: >>> >>> http://www.cdc.noaa.gov/people/jeffrey.s.whitaker/ortho.png >>> >>> This was generated using pcolor by the plotmap_ortho.py example >>> script now in CVS. It requires the pcolor masked-array patch I sent >>> to the matplotlib-devel list this morning. For some reason, >>> pylab.contour goes berserk when you try to contour data on this >>> projection - I;m still working on that. >>> >>> -Jeff >> >> Jeff, >> >> That is slick! You're using PROJ4, right? I'm happy to see a >> working application of orthographic projection. We need to talk >> sometime about how to hook pylab up to GIS data through GDAL/OGR or >> to web services using WMS/WFS. >> >> cheers, >> Sean >> >> -- >> -- Sean Gillies sgillies at frii dot com http://zcologia.com |
|
From: Florian L. <mai...@xg...> - 2005-05-13 23:56:17
|
Am Freitag, 13. Mai 2005 18:49 schrieb John Hunter:
> >>>>> "Florian" == Florian Lindner <mai...@xg...> writes:
>
> Florian> No. I pasted the complete script into the mail. There is
> Florian> nothing else I execute...
>
> Please post the following commands, or their equivalent for your
> platform, and their output. Please include the commands you actually
> type in your post.
>
> > cat test.py
> > /usr/bin/python2.4 ./test.py --verbose-helpful
Here we go:
florian@horus ~/visualizer $ cat test.py
from matplotlib.backends.backend_agg import FigureCanvasAgg as FigureCanvas
from matplotlib.figure import Figure
fig = Figure()
canvas = FigureCanvas(fig)
ax = fig.add_subplot(111)
ax.plot([1,2,3])
ax.set_title('hi mom')
ax.grid(True)
ax.set_xlabel('time')
ax.set_ylabel('volts')
canvas.print_figure('test')
florian@horus ~/visualizer $ /usr/bin/python2.4 ./test.py --verbose-helpful
bash: /usr/bin/python2.4: Datei oder Verzeichnis nicht gefunden
florian@horus ~/visualizer $ /usr/bin/python ./test.py --verbose-helpful
matplotlib data path /usr/share/matplotlib
loaded rc file /usr/share/matplotlib/.matplotlibrc
matplotlib version 0.80
verbose.level helpful
interactive is False
platform is linux2
numerix Numeric 23.7
font search path ['/usr/share/matplotlib']
loaded ttfcache file /home/florian/.ttffont.cache
No module named pygtk
PyGTK version 1.99.16 or greater is required to run the GTK Matplotlib
backends
Ok, I admin I've just seen that the .matplotlibrc sets GTK as the default
backend. But isn't that being overwritten?
florian@horus ~/visualizer $ cat /usr/share/matplotlib/.matplotlibrc | grep
backend
backend : GTKAgg # the default backend
[...]
Regards,
Florian
|
|
From: Ted D. <ted...@jp...> - 2005-05-13 23:27:46
|
Very cool! At some point in the future we'll be interested in modifying/extending the basemap module to allow other data sets. In particular, we're going to need to do maps of Mars using the Mars laser altimeter database (MOLA). http://pds-geosciences.wustl.edu/missions/mgs/megdr.html I wonder if the ability use GIS data sets could be worked in at the same time using some type of common architecture? Ted At 12:34 PM 5/13/2005, Sean Gillies wrote: >On May 13, 2005, at 1:26 PM, Jeff Whitaker wrote: > >> >>I just added the orthographic projection to the basemap toolkit - you can >>now make really nifty pseudo-satellite views of global data. >> >>Here's an example: >> >>http://www.cdc.noaa.gov/people/jeffrey.s.whitaker/ortho.png >> >>This was generated using pcolor by the plotmap_ortho.py example script >>now in CVS. It requires the pcolor masked-array patch I sent to the >>matplotlib-devel list this morning. For some reason, pylab.contour goes >>berserk when you try to contour data on this projection - I;m still >>working on that. >> >>-Jeff > >Jeff, > >That is slick! You're using PROJ4, right? I'm happy to see a working >application of orthographic projection. We need to talk sometime about >how to hook pylab up to GIS data through GDAL/OGR or to web services using >WMS/WFS. > >cheers, >Sean > >-- >Sean Gillies >sgillies at frii dot com >http://zcologia.com > > > >------------------------------------------------------- >This SF.Net email is sponsored by Oracle Space Sweepstakes >Want to be the first software developer in space? >Enter now for the Oracle Space Sweepstakes! >http://ads.osdn.com/?ad_id=7393&alloc_id=16281&op=click >_______________________________________________ >Matplotlib-users mailing list >Mat...@li... >https://lists.sourceforge.net/lists/listinfo/matplotlib-users |
|
From: Peter G. <pgr...@ge...> - 2005-05-13 20:06:11
|
wow.. that's impressive! Jeff Whitaker wrote: > > I just added the orthographic projection to the basemap toolkit - you > can now make really nifty pseudo-satellite views of global data. > > Here's an example: > > http://www.cdc.noaa.gov/people/jeffrey.s.whitaker/ortho.png > > This was generated using pcolor by the plotmap_ortho.py example script > now in CVS. It requires the pcolor masked-array patch I sent to the > matplotlib-devel list this morning. For some reason, pylab.contour > goes berserk when you try to contour data on this projection - I;m > still working on that. > > -Jeff > -- Peter Groszkowski Gemini Observatory Tel: +1 808 9742509 670 N. A'ohoku Place Fax: +1 808 9359235 Hilo, Hawai'i 96720, USA |
|
From: Chris B. <Chr...@no...> - 2005-05-13 19:35:57
|
not to beat a dead horse, but.... Stephen Walton wrote: > Chris Barker wrote: >> Robert Kern wrote: >>> /usr/bin = Apple >>> /usr/local/bin = Anybody else >> For completeness' sake, that's the same rule for EVERY *nix > > Maybe I'm way out of line here, Well, I'm not going to say anyone is out of line, and of course we all have our specific needs, but I don't think you're following the standard. > but I have my systems set up so that > /usr/local is, confusingly enough, centrally mounted from an NFS server, the word "local" is weird. I don't think it has anything do do with the physical location of the filesystem in question. My understanding is that "local" means local to your system (or network), rather than part of the OS Vendor's setup. > So things like platform-specific builds of ATLAS and the > corresponding numarray/numpy/scipy builds have to go in /usr/lib. the platform specific issue is supposed to be handles by the difference between <whatever>lib/ and <whatever>share. share is supposed to have the platform independent portions, and lib the platform dependent versions. On heterogeneous file systems, there is supposed to be a: /usr/local/libPlatform1 /usr/local/libPlatform2 /usr/local/libPlatform3 etc, and appropriate linking is used so that the right one is used on each platform. Of course, now that I think about it, Python doesn't do this, putting nothing in share, while all the *.py and *.pyc files could be there. Having said this, I just found out last night that trying to install the wxPython rpms into a python in /usr/local/ is a pain! I never really "got" any of this until I read: http://www.pathname.com/fhs/pub/fhs-2.3.html -Chris -- Christopher Barker, Ph.D. Oceanographer NOAA/OR&R/HAZMAT (206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception Chr...@no... |
|
From: Sean G. <sgi...@fr...> - 2005-05-13 19:34:04
|
On May 13, 2005, at 1:26 PM, Jeff Whitaker wrote: > > I just added the orthographic projection to the basemap toolkit - you > can now make really nifty pseudo-satellite views of global data. > > Here's an example: > > http://www.cdc.noaa.gov/people/jeffrey.s.whitaker/ortho.png > > This was generated using pcolor by the plotmap_ortho.py example script > now in CVS. It requires the pcolor masked-array patch I sent to the > matplotlib-devel list this morning. For some reason, pylab.contour > goes berserk when you try to contour data on this projection - I;m > still working on that. > > -Jeff Jeff, That is slick! You're using PROJ4, right? I'm happy to see a working application of orthographic projection. We need to talk sometime about how to hook pylab up to GIS data through GDAL/OGR or to web services using WMS/WFS. cheers, Sean -- Sean Gillies sgillies at frii dot com http://zcologia.com |
|
From: Jeff W. <js...@fa...> - 2005-05-13 19:26:42
|
I just added the orthographic projection to the basemap toolkit - you can now make really nifty pseudo-satellite views of global data. Here's an example: http://www.cdc.noaa.gov/people/jeffrey.s.whitaker/ortho.png This was generated using pcolor by the plotmap_ortho.py example script now in CVS. It requires the pcolor masked-array patch I sent to the matplotlib-devel list this morning. For some reason, pylab.contour goes berserk when you try to contour data on this projection - I;m still working on that. -Jeff -- Jeffrey S. Whitaker Phone : (303)497-6313 Meteorologist FAX : (303)497-6449 NOAA/OAR/CDC R/CDC1 Email : Jef...@no... 325 Broadway Office : Skaggs Research Cntr 1D-124 Boulder, CO, USA 80303-3328 Web : http://tinyurl.com/5telg |
|
From: Stephen W. <ste...@cs...> - 2005-05-13 19:11:11
|
John Hunter wrote:
> What is the signature of plotyy -- I wasn't aware of this function..
PLOTYY(X1,Y1,X2,Y2) plots Y1 versus X1 with y-axis labeling
on the left and plots Y2 versus X2 with y-axis labeling on
the right.
PLOTYY(X1,Y1,X2,Y2,FUN) uses the plotting function FUN
instead of PLOT to produce each graph. FUN can be a
function handle or a string that is the name of a plotting
function, e.g. plot, semilogx, semilogy, loglog, stem,
etc. or any function that accepts the syntax H = FUN(X,Y).
For example
PLOTYY(X1,Y1,X2,Y2,@loglog) % Function handle
PLOTYY(X1,Y1,X2,Y2,'loglog') % String
I just happened to have MATLAB going in anohter window.
|
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From: Stephen W. <ste...@cs...> - 2005-05-13 19:04:17
|
Chris Barker wrote: > Robert Kern wrote: > >> /usr/bin = Apple >> /usr/local/bin = Anybody else > > > For completeness' sake, that's the same rule for EVERY *nix Maybe I'm way out of line here, but I have my systems set up so that /usr/local is, confusingly enough, centrally mounted from an NFS server, as is /opt. So things like platform-specific builds of ATLAS and the corresponding numarray/numpy/scipy builds have to go in /usr/lib. I manage all this with RPM per the handy scripts Fernando posted some time ago. |
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From: Chris B. <Chr...@no...> - 2005-05-13 17:53:37
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Florian Lindner wrote: > Hello, > taken form the tutorial http://matplotlib.sourceforge.net/leftwich_tut.txt I > use the code: > > from matplotlib.backends.backend_agg import FigureCanvasAgg as FigureCanvas > from matplotlib.figure import Figure > > fig = Figure() > canvas = FigureCanvas(fig) > ax = fig.add_subplot(111) > ax.plot([1,2,3]) > ax.set_title('hi mom') > ax.grid(True) > ax.set_xlabel('time') > ax.set_ylabel('volts') > canvas.print_figure('test') > > Which IMO uses the AGG backend (which works fine for my using the pylab > interface). > > But upon excecution I get: > > No module named pygtk > PyGTK version 1.99.16 or greater is required to run the GTK Matplotlib > backends while this shouldn't be necessary for this script, you might try: import matplotlib matplotlib.use("AGG") # I may have that string wrong. before any of the other imports. -Chris -- Christopher Barker, Ph.D. Oceanographer NOAA/OR&R/HAZMAT (206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception Chr...@no... |
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From: John H. <jdh...@ac...> - 2005-05-13 16:50:13
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>>>>> "Florian" == Florian Lindner <mai...@xg...> writes:
Florian> No. I pasted the complete script into the mail. There is
Florian> nothing else I execute...
Please post the following commands, or their equivalent for your
platform, and their output. Please include the commands you actually
type in your post.
> cat test.py
> /usr/bin/python2.4 ./test.py --verbose-helpful
JDH
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From: Florian L. <mai...@xg...> - 2005-05-13 16:44:37
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Am Freitag, 13. Mai 2005 18:41 schrieb Alan G Isaac: > On Fri, 13 May 2005, Florian Lindner apparently wrote: > > No module named pygtk > > PyGTK version 1.99.16 or greater is required to run the GTK Matplotlib > > backends > > What is wrong there? > > Sorry if this is otiose but: > do you have pygtk? > http://www.pygtk.org/ No, and I don't want it. I want to use the AGG backend for generating graphics. Florian |
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From: Florian L. <mai...@xg...> - 2005-05-13 16:43:37
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Am Freitag, 13. Mai 2005 18:40 schrieb John Hunter: > >>>>> "Florian" == Florian Lindner <mai...@xg...> writes: > > Florian> Which IMO uses the AGG backend (which works fine for my > Florian> using the pylab interface). > > Florian> But upon excecution I get: > > Florian> No module named pygtk PyGTK version 1.99.16 or greater is > Florian> required to run the GTK Matplotlib backends > > > Florian> What is wrong there? > > My guess is that you are importing pylab somewhere in your script. Is > this the case? No. I pasted the complete script into the mail. There is nothing else I execute... Thx, Florian |
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From: John H. <jdh...@ac...> - 2005-05-13 16:41:00
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>>>>> "Florian" == Florian Lindner <mai...@xg...> writes:
Florian> Which IMO uses the AGG backend (which works fine for my
Florian> using the pylab interface).
Florian> But upon excecution I get:
Florian> No module named pygtk PyGTK version 1.99.16 or greater is
Florian> required to run the GTK Matplotlib backends
Florian> What is wrong there?
My guess is that you are importing pylab somewhere in your script. Is
this the case?
JDH
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From: Alan G I. <ai...@am...> - 2005-05-13 16:40:57
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On Fri, 13 May 2005, Florian Lindner apparently wrote: > No module named pygtk > PyGTK version 1.99.16 or greater is required to run the GTK Matplotlib > backends > What is wrong there? Sorry if this is otiose but: do you have pygtk? http://www.pygtk.org/ Cheers, Alan Isaac |
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From: Florian L. <mai...@xg...> - 2005-05-13 16:34:54
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Hello, taken form the tutorial http://matplotlib.sourceforge.net/leftwich_tut.txt I use the code: from matplotlib.backends.backend_agg import FigureCanvasAgg as FigureCanvas from matplotlib.figure import Figure fig = Figure() canvas = FigureCanvas(fig) ax = fig.add_subplot(111) ax.plot([1,2,3]) ax.set_title('hi mom') ax.grid(True) ax.set_xlabel('time') ax.set_ylabel('volts') canvas.print_figure('test') Which IMO uses the AGG backend (which works fine for my using the pylab interface). But upon excecution I get: No module named pygtk PyGTK version 1.99.16 or greater is required to run the GTK Matplotlib backends What is wrong there? Thx, Florian |
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From: John H. <jdh...@ac...> - 2005-05-13 14:26:08
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>>>>> "Ye" == Ye Naiquan <Nai...@ma...> writes:
Ye> import wx
Ye> from pylab import *
You should not import pylab if you are embedding matplotlib in a GUI.
pylab controls the GUI as a convenience for writing quick scripts, and
so if you want to control the GUI you cannot use it.
See the examples/embedding_in_wx*.py and
http://matplotlib.sourceforge.net/faq.html#OO
Hope this helps,
JDH
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From: Robert K. <rk...@uc...> - 2005-05-13 07:48:15
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Chris Neff wrote: > I am trying out quiver using IPython (which I am new to so my apologies > if this is actually a IPython question) and matplotlib .80 and the > latest numeric. The code I try and the subsequent error: > > In [1]: x=ones([5,5]) > > In [2]: quiver(x,x) > --------------------------------------------------------------------------- > exceptions.TypeError Traceback (most > recent call last) > > C:\Documents and Settings\root\Desktop\<console> > > C:\Python24\Lib\site-packages\matplotlib\pylab.py in quiver(*args, **kwargs) > 2137 hold(h) > 2138 try: > -> 2139 ret = gca().quiver(*args, **kwargs) > 2140 draw_if_interactive() > 2141 except: > > C:\Python24\Lib\site-packages\matplotlib\axes.py in quiver(self, U, V, > *args, **kwargs) > 852 if do_scale: > 853 Nmax = maximum.reduce(maximum.reduce(N)) > --> 854 U *= (S/Nmax) > 855 V *= (S/Nmax) > 856 N /= Nmax > > TypeError: return array has incorrect type > > > What could be the issue? Thanks for the help. Pass in floating point arrays rather than integer arrays. quiver, on the whole, isn't terribly robust. I've been contemplating writing a replacement. quiver-users: how attached are you to this API? Personally, it fills me with a burning rage every time I think about it. -- Robert Kern rk...@uc... "In the fields of hell where the grass grows high Are the graves of dreams allowed to die." -- Richard Harter |
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