As the warning message indicates, I think this is a backend issue. The recommended backend (for screen display) is the Agg family, e.g., TkAgg, GTKAgg, etc.
I rarely use Windows and I never used matplotlib on Windows, so there is not much I can help. I'm not sure which backend is available on Windows, but try some other backend. http://matplotlib.sourceforge.net/faq/installing_faq.html#what-is-a-backend Also, please check out the binary installer for windows, http://matplotlib.sourceforge.net/faq/installing_faq.html#windows-questions Regards, -JJ On Tue, Jul 21, 2009 at 4:01 AM, Domenico Nappo<domenico.na...@gmail.com> wrote: > Hi JJ, > thanks for your reply. > Let me say first that I've some problems with installation, I think: when I > try to run ipython -pylab I got the following: > C:\Documents and Settings\user>ipython -pylab > Traceback (most recent call last): > File "C:\Python25\scripts\ipython.py", line 28, in <module> > IPython.Shell.start().mainloop() > File "C:\Python25\Lib\site-packages\IPython\Shell.py", line 1233, in start > return shell(user_ns = user_ns) > File "C:\Python25\Lib\site-packages\IPython\Shell.py", line 1108, in > __init__ > shell_class=MatplotlibMTShell) > File "C:\Python25\Lib\site-packages\IPython\Shell.py", line 793, in > __init__ > on_kill=[mainquit]) > File "C:\Python25\Lib\site-packages\IPython\ipmaker.py", line 103, in > make_IPython > embedded=embedded,**kw) > File "C:\Python25\Lib\site-packages\IPython\Shell.py", line 639, in > __init__ > user_ns,user_global_ns,b2 = > self._matplotlib_config(name,user_ns,user_global_ns) > File "C:\Python25\Lib\site-packages\IPython\Shell.py", line 559, in > _matplotlib_config > import matplotlib.pylab as pylab > File "C:\Python25\Lib\site-packages\matplotlib\pylab.py", line 253, in > <module> > from matplotlib.pyplot import * > File "C:\Python25\Lib\site-packages\matplotlib\pyplot.py", line 75, in > <module> > new_figure_manager, draw_if_interactive, show = pylab_setup() > File "C:\Python25\Lib\site-packages\matplotlib\backends\__init__.py", line > 25, in pylab_setup > globals(),locals(),[backend_name]) > File "C:\Python25\Lib\site-packages\matplotlib\backends\backend_gtk.py", > line 25, in <module> > from matplotlib.backends.backend_gdk import RendererGDK, FigureCanvasGDK > File "C:\Python25\lib\site-packages\matplotlib\backends\backend_gdk.py", > line 29, in <module> > from matplotlib.backends._backend_gdk import pixbuf_get_pixels_array > ImportError: No module named _backend_gdk > > If I comment the import statement for _backend_gdk in backend_gdk.py, > ipython runs well. > Below, the code: > In [20]: > X=load('E:\\user\\Applicazioni\\EFGExtractor\\dataJan03Dec08.matplotlibtest',converters={0:strpdate2num('%Y-%m-%d')}) > > In [21]: time = X[:,0] > > In [22]: time > Out[22]: array([ 731216., 731217., 731218., ..., 733040., 733041., 733042.]) > > In [23]: data = X[:,1] > > In [24]: data > Out[24]: array([ 150., 140., 142., ..., 92., 84., 76.]) > > > In [30]: fig = figure() > > In [31]: ax = fig.add_subplot(111) > > In [32]: ax.plot_date(time, data, '-') > Out[32]: [<matplotlib.lines.Line2D object at 0x0218B030>] > > In [33]: show() > > In [34]: fig.autofmt_xdate() > > > In [37]: > C:\Python25\lib\site-packages\matplotlib\backends\backend_gdk.py:148: > UserWarning: backend_gdk: unable to draw text at angles other than 0 or 90 > 'other than 0 or 90') > This time I've noticed the warning above: "unable to draw text at angles > other than 0 or 90" > Thanks in advance for any clarification... > 2009/7/17 Jae-Joon Lee <lee.j.j...@gmail.com> >> >> Please post a simple, standalone script that reproduces your problem, >> so that we can track down what is causing the problem. I don't think >> there has been any report of a similar issue (but not sure). As far as >> I know, autofmt_xdata only adjusts the alignment and rotation of the >> ticklabels and does not change the font property. >> >> -JJ >> >> >> On Thu, Jul 16, 2009 at 10:55 AM, Domenico >> Nappo<domenico.na...@gmail.com> wrote: >> > Whenever I try to use autofmt_xdate() on a Figure(), dates on x axis >> > disappear...I guess this is related with something concerning font >> > management... >> > Anyone experienced this kind of issues? >> > >> > I use most recent versions of matplotlib, numpy, gtk2, pygtk on a Python >> > 2.5 >> > platform (installed via binaries on a window xp machine). >> > >> > >> > ------------------------------------------------------------------------------ >> > Enter the BlackBerry Developer Challenge >> > This is your chance to win up to $100,000 in prizes! For a limited time, >> > vendors submitting new applications to BlackBerry App World(TM) will >> > have >> > the opportunity to enter the BlackBerry Developer Challenge. See full >> > prize >> > details at: http://p.sf.net/sfu/Challenge >> > _______________________________________________ >> > Matplotlib-users mailing list >> > Matplotlib-users@lists.sourceforge.net >> > https://lists.sourceforge.net/lists/listinfo/matplotlib-users >> > >> > > > ------------------------------------------------------------------------------ _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
