Re: [Matplotlib-users] QTagg, Latex, Label problem
Hallo Darren,
thank you very much
Darren Dale schrieb:
>>embedding in Qt, displaying TeX within such a window and finally
>>save the plot as postscript.
>
...
>>function, to create labels (with TeX) but they are not displayed.
>
>
> The example you posted works fine for me. Are you sure you have installed and
> properly configured all the required external dependencies? See
> http://www.scipy.org/Cookbook/Matplotlib/UsingTex for more details.
>
I guess I installed correctly as the standard examples provided
with matplotlib work as expected.
Also if I remove all TeX related stuff and just place the following line
in the original "embedding_in_qt.py" function compute_initial_figure:
self.axes.set_xlabel("label")
the label is not displayed. On another machine WindowsXP, Qt4
python 2.4.3 and matplotlib 0.87.7 I experience the same problem
self.axes.set_xlabel("label")
added to compute_initial_figure in "embedding_in_qt4.py" doesn't
display a label (embedding in tk works as expected on both machines).
>>Additionally if I include self.print_figure("test.eps")
>>
...
>
>
> Your class MyMplCanvas needs a figure attribute. Change all self.fig
> references to self.figure (see attached).
>
Thank you very much this works (but also the postscript output does not
display the label).
(BTW during playing I recogized maybe a small issue in backend_qt4agg
line 152 in print_figure if arg dpi is None matplotlib.rcParams is
accessed but matplotlib.rcParams is not imported)
Regards
Gerhard
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Re: [Matplotlib-users] ANN: matplotlib-0.90.0
Hi Charlie, Great to see a new release, will put some time aside to test it with wxPython early next week. I can't see a reference to the wxPython backend, will it still require the Unicode build or can one use the Ansi build and which versions of wxPython are supported? Werner - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Native file format
On 2/4/07, Eric Firing <[EMAIL PROTECTED]> wrote: > Jan Strube wrote: > > Hi List, > > is there a way to store matplotlib figures in something like a native > > file format? > > I am thinking of something that keeps track of all the objects > > (patches(?)) in a mpl figure, so that later you could just revisit that > > figure and change properties. > > Or add/remove objects from the canvas. > > I didn't find anything on the website. > > Thanks, > > Jan > > No, there is no mechanism for doing this, although I think it has been > requested before. > > Eric > Why can't mpl's figures be pickled? Best, Edin - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] basemap conversion to Google Earth?
Hello - Can basemap help with a coversion to Google Earth coordinates and mabye even a kmz file? Thanks, Mark - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Importing Binary files
Hi, > if it's just a block of bytes in a standard type from and n-d array, you > can use numpy.fromfile() I should also say that I have just committed a rewrite of the binary file reading stuff to scipy, so if you have the latest scipy SVN (as of a few minutes ago), you can do something like: from StringIO import StringIO import numpy as N from scipy.io import npfile arr = N.arange(10).reshape(5,2) # write in Fortran order, Big endian, read back in C, system endian my_file = StringIO() npf = npfile(my_file, order='F', endian='>') npf.write_array(arr) npf.rewind() npf.read_array((5,2), arr.dtype) Best, Matthew - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] basemap conversion to Google Earth?
Mark Bakker wrote: > Hello - > > Can basemap help with a coversion to Google Earth coordinates and > mabye even a kmz file? > > Thanks, Mark Mark: AFAICT, google earth uses geographic coordinates (just plain lat and lon, with no map projection). Basemap could help if you have data on a map projection grid, and you want to convert it to lat/lon. KML/KMZ is just a file format that Google Earth uses to store information, such as placemarks, descriptions, ground overlays, paths, and polygons. Basemap doesn't have any ability to read or write these files, but contributions are always welcome. -Jeff -- Jeffrey S. Whitaker Phone : (303)497-6313 NOAA/OAR/CDC R/PSD1FAX : (303)497-6449 325 BroadwayBoulder, CO, USA 80305-3328 - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] ANN: matplotlib-0.90.0
On 2/7/07, Werner F. Bruhin <[EMAIL PROTECTED]> wrote: > Hi Charlie, > > Great to see a new release, will put some time aside to test it with > wxPython early next week. > > I can't see a reference to the wxPython backend, will it still require > the Unicode build or can one use the Ansi build and which versions of > wxPython are supported? Well, we haven't built any binaries yet. We pushed a source release fast to try to get it into Feisty. Sorry Chris! With wx2.8 out now and this being a major release, we definitely need to rethink wx builds. We stuck with unicode for 0.87 to avoid confusion. I would be happy to hear what wx users think/want. - Charlie - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] ANN: matplotlib-0.90.0
Charlie Moad wrote: > On 2/7/07, Werner F. Bruhin <[EMAIL PROTECTED]> wrote: >> Hi Charlie, >> >> Great to see a new release, will put some time aside to test it with >> wxPython early next week. >> >> I can't see a reference to the wxPython backend, will it still require >> the Unicode build or can one use the Ansi build and which versions of >> wxPython are supported? > > Well, we haven't built any binaries yet. We pushed a source release > fast to try to get it into Feisty. Sorry Chris! With wx2.8 out now > and this being a major release, we definitely need to rethink wx > builds. We stuck with unicode for 0.87 to avoid confusion. I would > be happy to hear what wx users think/want. For me the ideal would be not to be depended on a particular release of wxPython - big surprise no :-) . If I understand it correctly the dependency came in for performance optimization, does 2.8 change something for this. - If yes, I would not see a problem with 0.9 requiring as a minimum 2.8.0.1 but going forward I could use any 2.8.x or newer release. - If no, then I guess we have to live with having a "fixed" dependency, e.g. 0.87 is wxPython 2.6.x, 0.90 is wxPython 2.8.x, but it should through at least a warning if one tries to use it with another wxPython release. Werner - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] QTagg, Latex, Label problem
On Wednesday 07 February 2007 03:17:06 am Gerhard Spitzlsperger wrote:
> Hallo Darren,
>
> thank you very much
>
> Darren Dale schrieb:
> >>embedding in Qt, displaying TeX within such a window and finally
> >>save the plot as postscript.
>
> ...
>
> >>function, to create labels (with TeX) but they are not displayed.
> >
> > The example you posted works fine for me. Are you sure you have installed
> > and properly configured all the required external dependencies? See
> > http://www.scipy.org/Cookbook/Matplotlib/UsingTex for more details.
>
> I guess I installed correctly as the standard examples provided
> with matplotlib work as expected.
To which examples are you referring? The usetex example?
> Also if I remove all TeX related stuff and just place the following line
> in the original "embedding_in_qt.py" function compute_initial_figure:
>
> self.axes.set_xlabel("label")
>
> the label is not displayed.
You disable usetex, and your text is not being rendered. Is that correct? If
so, the problem has nothing to do with the LaTeX layout engine. I suggest
writing the shortest possible example that illustrates the problem (your
previous example is obviously too complex, since the label is not rendered
even without usetex enabled), run it with your rc.verbose.level set to debug,
and post again.
Darren
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[Matplotlib-users] Notes on switching backends to qt4 on mac os x
Here are some notes I made -- I hope it might save someone a bit of time. So, I finally tried out a few other backends on mac os x. I had been recommending and using TkAgg, as this works out of the box on mac os x. However, it seems unsnappy sometimes, and there was this strange issue with the first window not giving control back to the command line. QT4 takes *forever* to compile, but it seems to compile easier now than previous versions that needed a small library hack. The default configuration compiles and installs fine. The other tools (PyQt4 and SIP) also compile and install painlessly with the default configuration. I initially forgot to set the -q4thread for ipython (since the other - pylab flag is hidden in a launching script). After that it worked mostly fine. I found that the correct threading was sensitive to how I started ipython. I have been using terminal, and I was starting ipython like this: bash -l -c /path/to/ipython -q4thread from within a terminal .term file (i.e., the terminal starts running ipython automatically). This seems to not work great. However, when I put this command in a script, and run the script like bash -l -c pylab_start_script thinks work as expected. This is also true when just typing these commands in on the command line. I almost always start ipython from a terminal .term file from quicksilver. This gives me a dedicated (color coded) ipython window instantly that does not take away my shell. This is all pretty slick, and I am pleased with the setup now. Developers: Finally, I had to make some small changes to the qt4 backend so that things worked right. One is an essential change -- the latin1() method no longer exists in the newer qt. The other is a cosmetic change so that I can see the cursor position in the toolbar better. Diff below. -Rob Index: backend_qt4.py === --- backend_qt4.py (revision 2999) +++ backend_qt4.py (working copy) @@ -148,7 +148,7 @@ def _get_key( self, event ): if event.key() < 256: -key = event.text().latin1() +key = str(event.text()) elif self.keyvald.has_key( event.key() ): key = self.keyvald[ event.key() ] else: @@ -290,7 +290,7 @@ # The automatic layout doesn't look that good - it's too close # to the images so add a margin around it. -margin = 4 +margin = 12 button.setFixedSize( image.width()+margin, image.height ()+margin ) QtCore.QObject.connect( button, QtCore.SIGNAL( 'clicked ()' ), @@ -301,7 +301,7 @@ # The stretch factor is 1 which means any resizing of the toolbar # will resize this label instead of the buttons. self.locLabel = QtGui.QLabel( "", self ) -self.locLabel.setAlignment( QtCore.Qt.AlignRight | QtCore.Qt.AlignVCenter ) +self.locLabel.setAlignment( QtCore.Qt.AlignRight | QtCore.Qt.AlignTop ) self.locLabel.setSizePolicy(QtGui.QSizePolicy (QtGui.QSizePolicy.Ignored, QtGui.QSizePolicy.Ignored)) self.layout.addWidget( self.locLabel, 1 ) Rob Hetland, Associate Professor Dept. of Oceanography, Texas A&M University http://pong.tamu.edu/~rob phone: 979-458-0096, fax: 979-845-6331 - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] DIscretization of colorbar
You can also take a look at the wiki http://www.scipy.org/Cookbook/Matplotlib/ColormapTransformations There you'll find the code I had about colormap discretization. Maybe it does the same thing Eric discussed, however. Cheers, David 2007/2/6, Eric Firing <[EMAIL PROTECTED]>: Claas Teichmann wrote: > Hi David and Eric, > > one year ago, you discussed a discretazation of the colorbar with > imshow() in matplotlib-users. The topic was "DIscretization of > colorbar". Did you succeed in using a discrete colorbar? Yes, I completely rewrote the colorbar code, and it is now quite flexible. > > I put a request to the mailinglist with the topic "Wrong > colorbar-ticks in imshow-colorbar with 10 colors". Maybe one of you > already got the answer? > > Many greetings! > > Claas :-) Assuming you have a reasonably recent version of mpl, you can modify your colorbar call this way: colorbar(ticks=linspace(im.norm.vmin, im.norm.vmax, 11)) (This is for your example with a 10-entry colormap.) Because of a default parameter that is not exposed, it will label only every second color boundary in the example from your earlier message. To make it label every boundary, you could use from matplotlib import ticker ticks = linspace(im.norm.vmin, im.norm.vmax, 11) tickmaker = ticker.FixedLocator(ticks, nbins=20) # make nbins >= number of ticks colorbar(ticks=tickmaker) Eric - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] ANN: matplotlib-0.90.0
On 2/7/07, Werner F. Bruhin <[EMAIL PROTECTED]> wrote: > Charlie, > > Charlie Moad wrote: > > On 2/7/07, Werner F. Bruhin <[EMAIL PROTECTED]> wrote: > >> Hi Charlie, > >> > >> Great to see a new release, will put some time aside to test it with > >> wxPython early next week. > >> > >> I can't see a reference to the wxPython backend, will it still require > >> the Unicode build or can one use the Ansi build and which versions of > >> wxPython are supported? > > > > Well, we haven't built any binaries yet. We pushed a source release > > fast to try to get it into Feisty. Sorry Chris! With wx2.8 out now > > and this being a major release, we definitely need to rethink wx > > builds. We stuck with unicode for 0.87 to avoid confusion. I would > > be happy to hear what wx users think/want. > For me the ideal would be not to be depended on a particular release of > wxPython - big surprise no :-) . > > If I understand it correctly the dependency came in for performance > optimization, does 2.8 change something for this. > > - If yes, I would not see a problem with 0.9 requiring as a minimum > 2.8.0.1 but going forward I could use any 2.8.x or newer release. > - If no, then I guess we have to live with having a "fixed" dependency, > e.g. 0.87 is wxPython 2.6.x, 0.90 is wxPython 2.8.x, but it should > through at least a warning if one tries to use it with another wxPython > release. A while back there was some talk on the dev list about a pure python blitting method. I believe 2.8 had features that made this possible. I don't think anyone actually implemented this though. I'll have to check if the current native wx code even compiles with 2.8. The pure-python wx interface is still there and works but doesn't allow for efficient blitting. - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Wheel mouse
Hello, I'm using matplotlib 0.85 in FigureCanvasGTKAgg backend. I'm usign mpl_connect method to connect mouse event to function, but I'm not able to capture mouse wheel motion. Could somebody help me? Thanks marco - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Trying
That works for me. Thanks. I was trying to muck around with _lut
directly and make a sentinel version of LinearSegmentedColormap. As I
didn't really know what I was doing, I was having some strange
results. Also, in case other folks don't realize this, you can
initialize this with a Colormap, LinearSegmentedColormap, etc.
I'd be happy to update the SciPy wiki. Is it customary to give credit
to various authors (obviously George Nurser and the original author,
not me) in the doc strings, wiki text or what?
Thanks,
-michael
On 2/6/07, George Nurser <[EMAIL PROTECTED]> wrote:
> On 05/02/07, John Hunter <[EMAIL PROTECTED]> wrote:
> > On 2/5/07, Michael Lerner <[EMAIL PROTECTED]> wrote:
> > > Hi,
> > >
> > > I have some data where I'd like almost all of it to be plotted with a
> > > LinearSegmentedColormap that I've made, but I have a few special
> > > values that I'd like to set to specific colors (white, in this case).
> > > So, I made a LinearSegmentedColormap that works pretty well, but I'm
> > > having trouble with the rest. I found a nice-looking example at
> > >
> > > http://www.scipy.org/Cookbook/Matplotlib/Plotting_Images_with_Special_Values
> > >
> > > But, it doesn't work for me. In particular, it complains a lot about
> > > _lut. I'm using matplotlib 0.87.7 on an intel Mac running OS X and
> > > python 2.4.
> >
> > On a very quick read, it appears that the sentinel map in that example
> > forgot to initialize the baseclass. Eg, you need
> >
> > class SentinelMap(Colormap):
> > def __init__(self, cmap, sentinels={}):
> > Colormap.__init__(self) # init the base class
> > # boilerplate stuff - rest of init function here
> >
> > See if that helps, and let us know. If you get it working, please fix
> > the wiki (you may have to sign up) and post your example along with
> > it.
> >
> > Otherwise, please post a complete code example and we'll see what we can do.
> >
> > JDH
> >
> >
> > >
> > > Can someone show me how to make a sentinel'd version of a
> > > LinearSegmentedColormap?
> > >
> > > Thank you,
> > >
> > > -Michael Lerner
>
> I had the same problem that you did with the sentinels.py.
>
> I modified the code so that it did work, and attach it here. you can
> test it by running it. It only works with numpy, because it uses
> fancy indexing. I'm pretty sure it's not done the fastest way.
>
> You first make up the colormap instance for the real data, without any
> sentinels.
> then use the colormap instance as an argument to the sentinel
> colormap. This is why it
> doesn't do a Colormap.__init__(self). Not sure that's really best,
> but i just followed the original method.
>
> HTH. George Nurser.
>
>
--
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Carlson Lab, University of Michigan
http://www.umich.edu/~mlerner http://lernerclan.net
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Re: [Matplotlib-users] Notes on switching backends to qt4 on mac os x
Hi Rob, On Wednesday 07 February 2007 09:06:42 am Rob Hetland wrote: > Developers: Finally, I had to make some small changes to the qt4 > backend so that things worked right. One is an essential change -- > the latin1() method no longer exists in the newer qt. The other is a > cosmetic change so that I can see the cursor position in the toolbar > better. Diff below. Thanks for the notes, and for the patch. I moved the margin adjustment you suggested into a class attribute of NavigationToolbar2QT. This way, FigureManagerQT can get that information, which is needed to properly set the height of the figure window. (figsize=(6,4) should yield a 6"x4" plotting area, the height of the entire window is larger than 4" to accommodate the toolbar.) Changes in svn 3004. Darren - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Native file format
On 2/7/07, Edin Salkovic <[EMAIL PROTECTED]> wrote: On 2/4/07, Eric Firing <[EMAIL PROTECTED]> wrote: > Jan Strube wrote: > > Hi List, > > is there a way to store matplotlib figures in something like a native > > file format? > > I am thinking of something that keeps track of all the objects > > (patches(?)) in a mpl figure, so that later you could just revisit that > > figure and change properties. > > Or add/remove objects from the canvas. > > I didn't find anything on the website. > > Thanks, > > Jan > > No, there is no mechanism for doing this, although I think it has been > requested before. > > Eric > Why can't mpl's figures be pickled? Best, Edin Sorry, don't know anything about pickling. Is it device-independent? If I have a problem, could I pickle the figure, attach it to a bug report? Can I share the files with colleagues on different architechtures? If so, it maybe good enough. But otherwise I was more thinking of something like YAML or so. Cheers, Jan - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Wheel mouse
On 2/7/07, Marco Fumana <[EMAIL PROTECTED]> wrote:
> Hello,
> I'm using matplotlib 0.85 in FigureCanvasGTKAgg backend.
> I'm usign mpl_connect method to connect mouse event to function, but
> I'm not able to capture mouse wheel motion.
> Could somebody help me?lotlib-users
Hmm, this surprised me but I just confirmed it. In older versions of
gtk, if I recall correctly and maybe Steve can confirm, you could get
scroll events as buttons 4 and 5 on button_press_event, but it looks
like you now have to explicitly connect to scroll_event apparently.
mpl should encapsulate the scroll_event across backends, me thinks.
For now you should be able to do
canvas.connect('scroll_event', yourfunc)
but these will be GTK events and callbacks so they will have a
different signature than the mpl callback and will not have the mpl
metadata like xdata and ydata.
JDH
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Re: [Matplotlib-users] Native file format
On 2/7/07, Edin Salkovic <[EMAIL PROTECTED]> wrote: > Why can't mpl's figures be pickled? The main thing is we need to add pickle support for all of mpl's extension code http://docs.python.org/lib/node321.html In earlier attempts people got stuck with trying to pickle the CXX extension code, which was causing some problems, but these problems may be fixed in more recent versions of CXX. Todd Miller was the last person to look at this in some detail, I think. Other hinderances may come from the GUI layer, since figures store pointers to their canvases which in some cases come from GUI extension code that may not support pickling. But we can fairly easy decouple the figure from the canvas at pickle time and deal with pure mpl, numpy and python objects. The main work is to add pickle serialization to the mpl extension code. - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Native file format
On Feb 7, 2007, at 10:21 AM, John Hunter wrote: > On 2/7/07, Edin Salkovic <[EMAIL PROTECTED]> wrote: > >> Why can't mpl's figures be pickled? > > The main thing is we need to add pickle support for all of mpl's > extension code > > http://docs.python.org/lib/node321.html > > In earlier attempts people got stuck with trying to pickle the > CXX extension code, which was causing some problems, but these > problems may be fixed in more recent versions of CXX. Todd Miller was > the last person to look at this in some detail, I think. > I think Todd did get it to work, but I'll copy him on this just to make sure. > Other hinderances may come from the GUI layer, since figures store > pointers to their canvases which in some cases come from GUI extension > code that may not support pickling. But we can fairly easy decouple > the figure from the canvas at pickle time and deal with pure mpl, > numpy and python objects. The main work is to add pickle > serialization to the mpl extension code. > > -- > --- > Using Tomcat but need to do more? Need to support web services, > security? > Get stuff done quickly with pre-integrated technology to make your > job easier. > Download IBM WebSphere Application Server v.1.0.1 based on Apache > Geronimo > http://sel.as-us.falkag.net/sel? > cmd=lnk&kid=120709&bid=263057&dat=121642 > ___ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-users - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Native file format
Perry Greenfield wrote: > On Feb 7, 2007, at 10:21 AM, John Hunter wrote: > > >> On 2/7/07, Edin Salkovic <[EMAIL PROTECTED]> wrote: >> >> >>> Why can't mpl's figures be pickled? >>> >> The main thing is we need to add pickle support for all of mpl's >> extension code >> >> http://docs.python.org/lib/node321.html >> >> In earlier attempts people got stuck with trying to pickle the >> CXX extension code, which was causing some problems, but these >> problems may be fixed in more recent versions of CXX. Todd Miller was >> the last person to look at this in some detail, I think. >> >> > I think Todd did get it to work, but I'll copy him on this just to make > sure. > I looked at this in the context of numarray session saving and restoring. In that context, I believed there was a general problem with extension types not being picklable as a matter of developer expediency: first order, pickling support often doesn't get done. So my approach was to fudge a little and create "proxy" objects for things which wouldn't pickle rather than "fix all extension types." Where I left off CXX still didn't support pickling but a Python session with matplotlib and numarray could be saved; numarray arrays would be preserved, matplotlib objects would be "proxied" but unfortunately the proxies don't work in that case. Todd >> Other hinderances may come from the GUI layer, since figures store >> pointers to their canvases which in some cases come from GUI extension >> code that may not support pickling. But we can fairly easy decouple >> the figure from the canvas at pickle time and deal with pure mpl, >> numpy and python objects. The main work is to add pickle >> serialization to the mpl extension code. >> >> -- >> --- >> Using Tomcat but need to do more? Need to support web services, >> security? >> Get stuff done quickly with pre-integrated technology to make your >> job easier. >> Download IBM WebSphere Application Server v.1.0.1 based on Apache >> Geronimo >> http://sel.as-us.falkag.net/sel? >> cmd=lnk&kid=120709&bid=263057&dat=121642 >> ___ >> Matplotlib-users mailing list >> Matplotlib-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/matplotlib-users >> > > > - > Using Tomcat but need to do more? Need to support web services, security? > Get stuff done quickly with pre-integrated technology to make your job easier. > Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 > ___ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] [matplotlib-devel] Notes on switching backends to qt4 on mac os x
Rob Hetland wrote: > The MPL Qt backend requires PyQt (or, better, Qt4 and PyQt4). PyQt does > compile against the Qt Library, and also takes quite a while to > complete. I guess I wasn't clear -- does the MPL QT back-end compile against QT? Or can you just install PyQt after MPL, and have it work? I'm on a quest to get as complete as possible a MPL binary for OS-X, so I need to know if I need to have PyQt all working to build an MPL binary that supports it. > PyQt does not use setuptools, and I am not sure how to make a > generally usable binary distribution from it. Does it build with distutils? If so, then, in theory, you can use bdist_mpkg to build a binary package. bdist_mpkg comes with Py2app. I say "in theory" because PyQt is pretty complex, so it may not s work out of the box. However, there was some work done a while back adapting py2app to support it, so it just may work. If it doesn't the folks on pythonmac list can probably help. > I would say that installation is quite easy (although time consuming) -- > perhaps just a good set of directions on the MPL site? That would certainly be a start -- though shouldn't such directions be on a QT or MacPython site. The pythonmac Wiki has had troubles lately, I'm afraid, though it seems to be up at the moment: http://www.pythonmac.org/wiki -Chris -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R(206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception [EMAIL PROTECTED] - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] ANN: matplotlib-0.90.0
Werner F. Bruhin wrote: > Great to see a new release, will put some time aside to test it with > wxPython early next week. looking forward to your reports. > which versions of wxPython are supported? I haven't tried the new one, but the last release worked well with wxPython2.6.3, but had some issues with 2.8.* -- I don't think anyone has addressed those yet. > Well, we haven't built any binaries yet. We pushed a source release > fast to try to get it into Feisty. Sorry Chris! well, I've been chattering on about this for awhile, but haven't contributed anything yet... > With wx2.8 out now > and this being a major release, we definitely need to rethink wx > builds. We stuck with unicode for 0.87 to avoid confusion. I would > be happy to hear what wx users think/want. I think it's time to just all unicode, all the way, but I mostly deal with English anyway. > For me the ideal would be not to be depended on a particular release of > wxPython - big surprise no :-) That would be nice. > If I understand it correctly the dependency came in for performance > optimization, does 2.8 change something for this. Perhaps. 2.8 has methods for directly setting the data in wxBitmaps. Before that, you needed to create a wxImage, then convert that to a bitmap. However, to do that right, you'd need to be able to get the Agg bitmap as a Python buffer object that is in the binary form required by the platform. I think the majors need RGB and/or RGBA, but I'm not totally sure about that (maybe OS-X is ARGB?) > - If yes, I would not see a problem with 0.9 requiring as a minimum > 2.8.0.1 but going forward I could use any 2.8.x or newer release. That would be a good way to go, or have fallback on the older methods for less than 2.8 -- so instead of saying "you need 2.8 to use the wx backend" we can say: "you'll get better performance with wx if you use > 2.8" > - If no, then I guess we have to live with having a "fixed" dependency, > e.g. 0.87 is wxPython 2.6.x, 0.90 is wxPython 2.8.x, but it should > through at least a warning if one tries to use it with another wxPython > release. Yes, it should. I've also started a patch for the build system that tries harder to make sure that you are building against the same wx that you are running -- that will at least help people built it themselves more easily. NOTE: I took a look at the wx backend code a while ago, and it looks like even without the new Bitmap handlers in 2.8, it could be faster with straight Python code. Key is that a wxImage can be created from a Python buffer object without copying the data. So if we can expose the Agg buffer as a Python buffer, as RGB, then we should be able to get decent performance with pure python. You'd still need to do the wxBitmapFromImage thing, but the accelerated back-end does that too. Look for a thread on this list a while back, with my and Ken's name on it. -Chris -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R(206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception [EMAIL PROTECTED] - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Numpy image module failure
I've just installed matplotlib on a 64 bit server running Suse Linux
Enterprise Server 9. I followed the instructions on the Installing
section from the webpage and everything seemed to install fine using the
defaults. I installed the latest version of Numpy, 1.0.1, then
proceeded to install matplotlib. (I had the devel packages of freetype,
libpng, and zlib installed.) I don't need a GUI Backend so I wasn't
worried about getting them installed properly. Everything seems fine, I
can import numpy and matplotlib into python. However, I run into this
problem when trying to do an import. Here's the sample code:
#!/usr/bin/env python
import os
import tempfile
import matplotlib
matplotlib.use('Agg') # force the antigrain backend
from matplotlib import rc
from matplotlib.backends.backend_agg import FigureCanvasAgg
from matplotlib.figure import Figure
from matplotlib.cbook import iterable
import matplotlib.numerix as nx
***snip***
And here is the output:
$ python test_matlib.py
The import of the numpy version of the _image module,
_ns_image, failed. This is is either because numpy was
unavailable when matplotlib was compiled, because a dependency of
_ns_image could not be satisfied, or because the build flag for
this module was turned off in setup.py. If it appears that
_ns_image was not built, make sure you have a working copy of
numpy and then re-install matplotlib. Otherwise, the following
traceback gives more details:
Traceback (most recent call last):
File "test_matlib.py", line 7, in ?
from matplotlib.backends.backend_agg import FigureCanvasAgg
File
"/usr/local/lib/python2.3/site-packages/matplotlib/backends/backend_agg.
py", line 77, in ?
from matplotlib._image import fromarray
File "/usr/local/lib/python2.3/site-packages/matplotlib/_image.py",
line 17, in ?
from matplotlib._ns_image import *
ImportError:
/usr/local/lib/python2.3/site-packages/matplotlib/_ns_image.so:
undefined symbol: _ZNSs4_Rep20_S_empty_rep_storageE
$
It seems like it's something very simple, but I can't seem to find what
went wrong. Anybody have any ideas??
Thanks
Josh
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Re: [Matplotlib-users] Trying
On 07/02/07, Michael Lerner <[EMAIL PROTECTED]> wrote: > That works for me. Thanks. I was trying to muck around with _lut > directly and make a sentinel version of LinearSegmentedColormap. As I > didn't really know what I was doing, I was having some strange > results. Also, in case other folks don't realize this, you can > initialize this with a Colormap, LinearSegmentedColormap, etc. > > I'd be happy to update the SciPy wiki. Please do. I believe the original code was written by Andrew Straw; at least he put it up on the wiki. A word of warning: because the code replaces various Normalize methods, it's not guaranteed to work with future mpl releases. It would be nice if something like this, but perhaps more efficient, was included in matplotlib. It's a useful thing to be able to do. Regards, George. - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Problem with adding an artist from one axes instance to another
I try to take artists from one subplot instance and add them to
another:
-
from matplotlib.backends.backend_agg import FigureCanvasAgg as FigureCanvas
from matplotlib.figure import Figure
from matplotlib.patches import Patch, Rectangle
from matplotlib.lines import Line2D
fig = Figure()
canvas = FigureCanvas(fig)
ax = fig.add_subplot(111)
ax.add_patch(Rectangle((.5, 1.5), 1, .2))
fig2 = Figure()
canvas2 = FigureCanvas(fig2)
ax2 = fig2.add_subplot(111)
for artist in ax.get_child_artists():
if isinstance(artist, Line2D):
ax2.add_line(artist)
elif isinstance(artist, Patch):
ax2.add_patch(artist)
ax2.add_patch(Rectangle((1.5, 2.5), 1, .2, facecolor='r'))
ax2.set_aspect("equal")
ax2.autoscale_view()
w, h = fig2.get_size_inches()
xmin, xmax = ax2.get_xlim()
ymin, ymax = ax2.get_ylim()
xext = xmax - xmin
yext = ymax - ymin
if xext < yext:
w = h * xext/yext
else:
h = w * yext/xext
size = fig2.set_size_inches(w, h)
canvas2.print_figure('copy2.eps')
-
But this fails to plot the first rectange in the resulting plot. The
second, red rectangle is painted correctly in the resulting plot, but
the first one is totaly missing in the plot, leaving only a line in
the plot. Is there some kind of internal status that has to be
resettet in the actors?
Kind regards
Berthold
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[Matplotlib-users] Fwd: Problem with adding an artist from one axes instance to another
> But this fails to plot the first rectange in the resulting plot. The > second, red rectangle is painted correctly in the resulting plot, but > the first one is totaly missing in the plot, leaving only a line in > the plot. Is there some kind of internal status that has to be > resettet in the actors? When you add an artist to the Axes, it checks to see if you have set a transformation. If you haven't, it will set the default axes transformation. If you have, it leaves the transformation unchanged. This is why you are seeing the problems you see. Before adding them to the second axes, you need to reset the transformation for each line, text, etc for artist in ax.get_child_artists(): artist.set_transform(ax2.transData) if isinstance(artist, Line2D): ax2.add_line(artist) elif should work JDH - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] troubles with contour3d, contourf3d in v0.87.5
Hi all, Did any progress get made beyond this discussion below? I'm trying to get contourf3D working, using latest svn, and it still seems to be out-of-order. Contour3D works, but I get exactly the same errors (and went exactly the same route trying to fix them) as Matthew. On 13/01/07, Eric Firing <[EMAIL PROTECTED]> wrote: > I don't know if everything 3D works, but the first error you note below Which one is supposed to be the 'first' error mentioned here? In my latest svn checkout, the line: levels, colls = self.contourf(X, Y, Z, 20) still appears to be present. > is fixed in svn, and I suspect in 0.87.7, the last release. 0.87.5 is > rather old--quite a bit has changed between minor releases. > > Eric > > Matthew Koichi Grimes wrote: > > contourf3D and contour3D seem to be broken in my copy of matplotlib > > 0.87.5 that I installed from ubuntu edgy's repositories. Is this a known > > problem? I started going through axes3d.py etc and fixing the reported > > errors, but the error trail seems to go pretty deep across multiple > > files. Now I'm wondering if maybe this is something major that has > > already been fixed by more experienced hands in SVN or something. > > > > In the off chance that this is an unknown problem, I've enumerated the > > errors below. These all happened while attempting to run the example > > code in http://www.scipy.org/Cookbook/Matplotlib/mplot3D > > > > If it's fixed in SVN, I'll try installing that, but I haven't seen this > > bug mentioned in matplotlib's bug list on sourceforge.net. > > > > -- Matt > > > > When I called contourf3D the first time, I got the following error: > > > > > > File "/usr/lib/python2.4/site-packages/matplotlib/axes3d.py", line 596, > > in contourf3D > > levels, colls = self.contourf(X, Y, Z, 20) > > TypeError: unpack non-sequence > > > > > > As suggested in the examples page above, I went into contourf3D's > > function definition in axes3d.py and replaced: > > > > levels, colls = self.contourf(X, Y, Z, 20) > > > > with > > > > C = self.contourf(X, Y, Z, *args, **kwargs) > > levels, colls = (C.levels, C.collections) > > > > I then got a new error when calling contourf3D: > > > > > > exceptions.NameError Traceback (most > > recent call last) > > > > /home/mkg/Desktop/ > > > > /usr/lib/python2.4/site-packages/matplotlib/axes3d.py in > > contourf3D(self, X, Y, Z, *args, **kwargs) > > 604 zs = [z1] * (len(linec._verts[0])/2) > > 605 zs += [z2] * (len(linec._verts[0])/2) > > --> 606 art3d.wrap_patch(linec, zs, fn=draw_polyc) > > 607 self.auto_scale_xyz(X,Y,Z, had_data) > > 608 return levels,colls > > > > NameError: global name 'draw_polyc' is not defined > > > > > > After changing draw_polyc to art3d.draw_polyc, it complained that > > art3d.wrap_patch in fact only takes two arguments. So I changed > > > > art3d.wrap_patch(linec, zs, fn=draw_polyc) > > > > to > > > > art3d.wrap_patch(linec, zs) > > > > Which led to the latest error message: > > > > > > Traceback (most recent call last): > > File > > "/usr/lib/python2.4/site-packages/matplotlib/backends/backend_gtk.py", > > line 284, in expose_event > > self._render_figure(self._pixmap, w, h) > > File > > "/usr/lib/python2.4/site-packages/matplotlib/backends/backend_gtkagg.py", > > line 73, in _render_figure > > FigureCanvasAgg.draw(self) > > File > > "/usr/lib/python2.4/site-packages/matplotlib/backends/backend_agg.py", > > line 391, in draw > > self.figure.draw(renderer) > > File "/usr/lib/python2.4/site-packages/matplotlib/figure.py", line > > 538, in draw > > for a in self.axes: a.draw(renderer) > > File "/usr/lib/python2.4/site-packages/matplotlib/axes3d.py", line > > 172, in draw > > Axes.draw(self, renderer) > > File "/usr/lib/python2.4/site-packages/matplotlib/axes.py", line 1057, > > in draw > > a.draw(renderer) > > File "/usr/lib/python2.4/site-packages/matplotlib/art3d.py", line 56, > > in call_draw3d > > self.draw3d(renderer) > > File "/usr/lib/python2.4/site-packages/matplotlib/art3d.py", line 184, > > in draw3d > > xs,ys = zip(*self._offsets) > > TypeError: zip() argument after * must be a sequence > > > > > > Contour3D (not contourf3D) does work in that it successfully displays a > > plot, but when I mouseover this plot, my python console fills with the > > following error message (one repetition for each mouse event): > > > > > > /usr/lib/python2.4/site-packages/matplotlib/backends/backend_gtk.py in > > motion_notify_event(self, widget, event) > > 178 # flipy so y=0 is bottom of canvas > > 179 y = self.allocation.height - y > > --> 180 FigureCanvasBase.motion_notify_event(self, x, y) > > 181 return False # finish event propagation? > > 182 > > > > /usr/lib/python2.4/site-packages/matplotlib/backend_bases.py in > > motion_notify_event(self, x, y, guiEvent) > >
Re: [Matplotlib-users] troubles with contour3d, contourf3d in v0.87.5
Angus McMorland wrote: > Hi all, > > Did any progress get made beyond this discussion below? I'm trying to > get contourf3D working, using latest svn, and it still seems to be > out-of-order. Contour3D works, but I get exactly the same errors (and > went exactly the same route trying to fix them) as Matthew. > > On 13/01/07, Eric Firing <[EMAIL PROTECTED]> wrote: >> I don't know if everything 3D works, but the first error you note below > > Which one is supposed to be the 'first' error mentioned here? In my > latest svn checkout, the line: > > levels, colls = self.contourf(X, Y, Z, 20) > > still appears to be present. > >> is fixed in svn, and I suspect in 0.87.7, the last release. 0.87.5 is >> rather old--quite a bit has changed between minor releases. Aha! What is fixed is the corresponding error in contour3D--but strangely, the same error in contourf3D was never fixed. I took a stab at it just now but failed--there is more wrong with it than this simple error--so I made it raise NotImplementedError. I don't know whether contourf3D ever *did* work. Nor am I sure exactly what it should do if it worked. The problem is that no one has taken on the maintenance of the 3D plotting. Eric - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
