matplotlib-users Mailing List for matplotlib

On 29 March 2013 20:15, Jeff Layton <lay...@at...> wrote:

> Good afternoon,
>
> I'd like to be able to plot some 2D Structured CFD meshes
> and contour plots (pressure, etc) using Matplotlib. I've
> googled a little but does anyone have any pointers or
> links to help get me started?
>
> Thanks!
>
> Jeff
>

The functions you want are 'contour' for contour line plots, and 'contourf'
for filled contour plots.  Start with
http://matplotlib.org/api/pyplot_api.html#matplotlib.pyplot.contour, which
describes the contour function and includes example plots with source code.

Ian

Thank you very much I have been able to plot from the data files, but
facing a slight glitch. The data points are being super imposed in
consecutive plots.That means if the 1st data file contains 50 points and
the second 30. The second plot will contain 80 points! How to go about this
problem?

for i in range(0,20):
  fname = 'file_' + str(i) + '.dat'
  f=open(fname,"r")
  x,y = np.loadtxt(fname, unpack=True)
  plt.scatter(x,y)
  pylab.savefig(fname + '.png')
  f.close()


On 28 March 2013 02:48, Steven Boada <bo...@ph...> wrote:

> Hey Sayan,
>
> Here is the manual page:
>
> http://docs.scipy.org/doc/**numpy/reference/generated/**
> numpy.genfromtxt.html<http://docs.scipy.org/doc/numpy/reference/generated/numpy.genfromtxt.html>
>
> It works (basically) the same as loadtxt, but it is more flexible when
> there are holes in your data.
>
> Good luck.
>
> Steven
>
>
> On Wed Mar 27 10:07:10 2013, Sayan Chatterjee wrote:
>
>> Hi Steven,
>>
>> I am a newbie to Python and hence Matplotlib. I cannot get your point
>> properly. Could you please redirect me to a page where the usage is
>> demonstrated?
>>
>> As I can see, you're a doctoral student in Physics, it might be
>> worthwhile to tell you that I'm trying to code a  Zeldovich
>> Approximation for a simple sinusoidal potential and want to make it
>> evolve with varying scale factor and make an animation of it.
>>
>> Cheers,
>> Sayan
>>
>>
>> On 27 March 2013 19:58, Steven Boada <bo...@ph...
>> <mailto:bo...@ph...**>> wrote:
>>
>>     Another, slightly more flexible, option is the genfromtxt
>>     function, also in numpy. Normally you should try genfromtxt after
>>     loadtxt doesn't work. Or, that is my normal method.
>>
>>     Steven
>>
>>
>>     On Wed Mar 27 07:16:45 2013, Sayan Chatterjee wrote:
>>
>>         Thank you very much for your prompt reply.
>>
>>         Florian,  your reply seems to be the answer to my question.
>>         I'll try
>>         it out. If can't figure out,I'll get back to you.
>>
>>
>>         On 27 March 2013 15:37, Florian M. Wagner
>>         <wag...@st... <mailto:wag...@st....**ch<wag...@st...>
>> >
>>         <mailto:wag...@st....**__ch
>>
>>         <mailto:wag...@st....**ch <wag...@st...>>>>
>> wrote:
>>
>>             Hey Sayan,
>>
>>             for reading in simple ASCII-Files containing your two
>>         arrays you
>>             should have a look at the numpy.loadtxt function.
>>
>>             Scatter plots in matplotlib are then easily created as
>>         shown here
>>         http://matplotlib.org/__**examples/pylab_examples/__**
>> scatter_demo.html<http://matplotlib.org/__examples/pylab_examples/__scatter_demo.html>
>>
>>         <http://matplotlib.org/**examples/pylab_examples/**
>> scatter_demo.html<http://matplotlib.org/examples/pylab_examples/scatter_demo.html>
>> >
>>
>>             For your purpose you can do something like:
>>
>>                 import os
>>                 import numpy as np
>>                 import matplotlib.pyplot as plt
>>
>>                 for file in os.path.listdir():
>>                     x, y = np.loadtxt(file, unpack=True)
>>                     plt.scatter(x,y)
>>                     plt.savefig(file + '.png')
>>
>>             Cheers,
>>
>>             Florian
>>
>>
>>             Am 27.03.2013 09:32, schrieb Sayan Chatterjee:
>>
>>                 Dear All,
>>
>>                 I'm new to Matplotlib. It might be a silly question,
>>             how does one
>>                 plot data(not functions) in Matplotlib.
>>
>>                 How:
>>                 1)Two arrays (X and Y) can be plotted in a scatter
>>             diagram?
>>
>>                 2) or a number of data files can used to produce
>>             different plots
>>                 having different(sequential) name?
>>
>>                 Thanks in anticipation.
>>                 Regards,
>>                 Sayan
>>
>>                 --
>>
>>
>>
>>             ------------------------------**
>> __----------------------------**--__--------------
>>
>>                 *Sayan  Chatterjee*
>>
>>                 Dept. of Physics and Meteorology
>>                 IIT Kharagpur
>>                 Lal Bahadur Shastry Hall of Residence
>>                 Room AB 205
>>                 Mob: +91 9874513565
>>                 blog: www.blissprofound.blogspot.com
>>             <http://www.blissprofound.**blogspot.com<http://www.blissprofound.blogspot.com>
>> >
>>                 <http://www.blissprofound.__bl**ogspot.com<http://blogspot.com>
>>
>>             <http://www.blissprofound.**blogspot.com<http://www.blissprofound.blogspot.com>
>> >>
>>
>>                 Volunteer , Padakshep
>>             www.padakshep.org <http://www.padakshep.org>
>>             <http://www.padakshep.org>
>>
>>
>>
>>
>>             ------------------------------**
>> __----------------------------**--__------------------
>>
>>                 Own the Future-Intel&reg; Level Up Game Demo Contest 2013
>>                 Rise to greatness in Intel's independent game demo
>>             contest.
>>                 Compete for recognition, cash, and the chance to get
>>             your game
>>                 on Steam. $5K grand prize plus 10 genre and skill prizes.
>>                 Submit your demo by
>>             6/6/13.http://p.sf.net/sfu/__**intel_levelupd2d<http://p.sf.net/sfu/__intel_levelupd2d>
>>             <http://p.sf.net/sfu/intel_**levelupd2d<http://p.sf.net/sfu/intel_levelupd2d>
>> >
>>
>>
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>> >>
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>> __lists/listinfo/matplotlib-__**users<https://lists.sourceforge.net/__lists/listinfo/matplotlib-__users>
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>> users <https://lists.sourceforge.net/lists/listinfo/matplotlib-users>>
>>
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>>
>>         ------------------------------**__----------------------------**
>> --__------------------
>>
>>             Own the Future-Intel&reg; Level Up Game Demo Contest 2013
>>             Rise to greatness in Intel's independent game demo contest.
>>             Compete for recognition, cash, and the chance to get your game
>>             on Steam. $5K grand prize plus 10 genre and skill prizes.
>>             Submit your demo by 6/6/13.
>>         http://p.sf.net/sfu/intel___**levelupd2d<http://p.sf.net/sfu/intel___levelupd2d>
>>         <http://p.sf.net/sfu/intel_**levelupd2d<http://p.sf.net/sfu/intel_levelupd2d>
>> >
>>             ______________________________**___________________
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>>         <mailto:Matplotlib-users@**lists.sourceforge.net<Mat...@li...>
>> >
>>             <mailto:Matplotlib-users@__lis**ts.sourceforge.net<http://lists.sourceforge.net>
>>         <mailto:Matplotlib-users@**lists.sourceforge.net<Mat...@li...>
>> >>
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>>
>>
>>
>>         --
>>
>>
>>         ------------------------------**__----------------------------**
>> --__--------------
>>
>>         *Sayan  Chatterjee*
>>
>>         Dept. of Physics and Meteorology
>>         IIT Kharagpur
>>         Lal Bahadur Shastry Hall of Residence
>>         Room AB 205
>>         Mob: +91 9874513565
>>         blog: www.blissprofound.blogspot.com
>>         <http://www.blissprofound.**blogspot.com<http://www.blissprofound.blogspot.com>
>> >
>>         <http://www.blissprofound.__bl**ogspot.com <http://blogspot.com>
>>
>>         <http://www.blissprofound.**blogspot.com<http://www.blissprofound.blogspot.com>
>> >>
>>
>>         Volunteer , Padakshep
>>         www.padakshep.org <http://www.padakshep.org>
>>         <http://www.padakshep.org>
>>
>>
>>
>>         ------------------------------**__----------------------------**
>> --__------------------
>>
>>         Own the Future-Intel&reg; Level Up Game Demo Contest 2013
>>         Rise to greatness in Intel's independent game demo contest.
>>         Compete for recognition, cash, and the chance to get your game
>>         on Steam. $5K grand prize plus 10 genre and skill prizes.
>>         Submit your demo by 6/6/13.
>>         http://p.sf.net/sfu/intel___**levelupd2d<http://p.sf.net/sfu/intel___levelupd2d>
>>         <http://p.sf.net/sfu/intel_**levelupd2d<http://p.sf.net/sfu/intel_levelupd2d>
>> >
>>
>>
>>         ______________________________**___________________
>>         Matplotlib-users mailing list
>>         Matplotlib-users@lists.__sourc**eforge.net<http://sourceforge.net>
>>         <mailto:Matplotlib-users@**lists.sourceforge.net<Mat...@li...>
>> >
>>         https://lists.sourceforge.net/**__lists/listinfo/matplotlib-__**
>> users <https://lists.sourceforge.net/__lists/listinfo/matplotlib-__users>
>>
>>         <https://lists.sourceforge.**net/lists/listinfo/matplotlib-**
>> users <https://lists.sourceforge.net/lists/listinfo/matplotlib-users>>
>>
>>
>>     --
>>
>>     Steven Boada
>>
>>     Doctoral Student
>>     Dept of Physics and Astronomy
>>     Texas A&M University
>>     bo...@ph... <mailto:bo...@ph...**>
>>
>>
>>
>>
>>
>> --
>>
>>
>> ------------------------------**------------------------------**
>> --------------
>> *Sayan  Chatterjee*
>> Dept. of Physics and Meteorology
>> IIT Kharagpur
>> Lal Bahadur Shastry Hall of Residence
>> Room AB 205
>> Mob: +91 9874513565
>> blog: www.blissprofound.blogspot.com
>> <http://www.blissprofound.**blogspot.com<http://www.blissprofound.blogspot.com>
>> >
>>
>> Volunteer , Padakshep
>> www.padakshep.org <http://www.padakshep.org>
>>
>
> --
>
> Steven Boada
>
> Doctoral Student
> Dept of Physics and Astronomy
> Texas A&M University
> bo...@ph...
>



-- 


--------------------------------------------------------------------------
*Sayan  Chatterjee*
Dept. of Physics and Meteorology
IIT Kharagpur
Lal Bahadur Shastry Hall of Residence
Room AB 205
Mob: +91 9874513565
blog: www.blissprofound.blogspot.com

Volunteer , Padakshep
www.padakshep.org

Hello!

I try to use a background image in my plot:

import matplotlib.pyplot as plt
im = plt.imread("WTunnel.png")
plt.xlim([-3,4])
plt.ylim([-0.01,0.05])
plt.plot(some stuff)
plt.imshow(im, aspect="auto", extent=(-5, 4, -0.01, 0.05))

This works more or less.

As far as I understand the extent argument works as scaling factor. Is there a 
way to move the background picture? I need to exactly set the x position since 
the background image is associated with the x data from the plots.

The origin argument seems to be promising, but it accepts only 
[None|‘upper’|‘lower’].

What is the best way to handle such a picture?

Background: The data is pressure measurements over x. The background image 
shows the geometric features of the measured object. Exact x_0 and dx is 
crucial, y values of the picture just need to look good ;-)

Thanks!

Florian

Am 31.03.2013 08:50, schrieb Pawel Chojnacki:
> Thank you very much - hovewer, your solution isn't enough. Adding your lines generate:
>

The problem is this:

> RuntimeError: LaTeX was not able to process the following string:
> u''
> Here is the full report generated by LaTeX:
>

Latex doesn't like the empty string. This is caused by the '\n' in your title.
Can you replace your original line:
	py.title(u'Wyniki eksperymentu pomiaru gęstości ciała stałego\n',size='large',family='serif')
with the new one, as in the example I sent you:
	py.title(u'Wyniki eksperymentu pomiaru gęstości ciała stałego',size='large',family='serif')

Thank you very much - hovewer, your solution isn't enough. Adding your
lines generate:

['\\usepackage{amsmath}', '\\usepackage[T1]{fontenc}']
Exception in Tkinter callback
Traceback (most recent call last):
  File "/usr/lib/python2.7/lib-tk/Tkinter.py", line 1437, in __call__
    return self.func(*args)
  File "/usr/lib/pymodules/python2.7/matplotlib/backends/backend_tkagg.py",
line 236, in resize
    self.show()
  File "/usr/lib/pymodules/python2.7/matplotlib/backends/backend_tkagg.py",
line 239, in draw
    FigureCanvasAgg.draw(self)
  File "/usr/lib/pymodules/python2.7/matplotlib/backends/backend_agg.py",
line 421, in draw
    self.figure.draw(self.renderer)
  File "/usr/lib/pymodules/python2.7/matplotlib/artist.py", line 55, in
draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/usr/lib/pymodules/python2.7/matplotlib/figure.py", line 898, in
draw
    func(*args)
  File "/usr/lib/pymodules/python2.7/matplotlib/artist.py", line 55, in
draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/usr/lib/pymodules/python2.7/matplotlib/axes.py", line 1997, in draw
    a.draw(renderer)
  File "/usr/lib/pymodules/python2.7/matplotlib/artist.py", line 55, in
draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/usr/lib/pymodules/python2.7/matplotlib/text.py", line 571, in draw
    self._fontproperties, angle)
  File "/usr/lib/pymodules/python2.7/matplotlib/backends/backend_agg.py",
line 215, in draw_tex
    Z = texmanager.get_grey(s, size, self.dpi)
  File "/usr/lib/pymodules/python2.7/matplotlib/texmanager.py", line 513,
in get_grey
    pngfile = self.make_png(tex, fontsize, dpi)
  File "/usr/lib/pymodules/python2.7/matplotlib/texmanager.py", line 442,
in make_png
    dvifile = self.make_dvi(tex, fontsize)
  File "/usr/lib/pymodules/python2.7/matplotlib/texmanager.py", line 371,
in make_dvi
    string:\n%s\nHere is the full report generated by LaTeX: \n\n'%
repr(tex)) + report)
RuntimeError: LaTeX was not able to process the following string:
u''
Here is the full report generated by LaTeX:

This is pdfTeX, Version 3.1415926-2.4-1.40.13 (TeX Live 2012/Debian)
 restricted \write18 enabled.
entering extended mode
(./2c666a8feb5dd27d92f3c286e7775fb6.tex
LaTeX2e <2011/06/27>
Babel <v3.8m> and hyphenation patterns for english, dumylang,
nohyphenation, po
lish, loaded.
(/usr/share/texlive/texmf-dist/tex/latex/base/article.cls
Document Class: article 2007/10/19 v1.4h Standard LaTeX document class
(/usr/share/texlive/texmf-dist/tex/latex/base/size10.clo))
(/usr/share/texlive/texmf-dist/tex/latex/type1cm/type1cm.sty)
(/usr/share/texlive/texmf-dist/tex/latex/psnfss/helvet.sty
(/usr/share/texlive/texmf-dist/tex/latex/graphics/keyval.sty))
(/usr/share/texlive/texmf-dist/tex/latex/psnfss/courier.sty)
(/usr/share/texlive/texmf-dist/tex/latex/base/textcomp.sty
(/usr/share/texlive/texmf-dist/tex/latex/base/ts1enc.def))
(/usr/share/texlive/texmf-dist/tex/latex/ucs/ucs.sty
(/usr/share/texlive/texmf-dist/tex/latex/ucs/data/uni-global.def))
(/usr/share/texlive/texmf-dist/tex/latex/base/inputenc.sty
(/usr/share/texlive/texmf-dist/tex/latex/ucs/utf8x.def))
(/usr/share/texlive/texmf-dist/tex/latex/amsmath/amsmath.sty
For additional information on amsmath, use the `?' option.
(/usr/share/texlive/texmf-dist/tex/latex/amsmath/amstext.sty
(/usr/share/texlive/texmf-dist/tex/latex/amsmath/amsgen.sty))
(/usr/share/texlive/texmf-dist/tex/latex/amsmath/amsbsy.sty)
(/usr/share/texlive/texmf-dist/tex/latex/amsmath/amsopn.sty))
(/usr/share/texlive/texmf-dist/tex/latex/base/fontenc.sty
(/usr/share/texlive/texmf-dist/tex/latex/base/t1enc.def))
(/usr/share/texlive/texmf-dist/tex/latex/geometry/geometry.sty
(/usr/share/texlive/texmf-dist/tex/generic/oberdiek/ifpdf.sty)
(/usr/share/texlive/texmf-dist/tex/generic/oberdiek/ifvtex.sty)
(/usr/share/texlive/texmf-dist/tex/generic/ifxetex/ifxetex.sty)

Package geometry Warning: Over-specification in `h'-direction.
    `width' (5058.9pt) is ignored.


Package geometry Warning: Over-specification in `v'-direction.
    `height' (5058.9pt) is ignored.

) (./2c666a8feb5dd27d92f3c286e7775fb6.aux)
(/usr/share/texlive/texmf-dist/tex/latex/base/ts1cmr.fd)
(/usr/share/texlive/texmf-dist/tex/latex/psnfss/t1pnc.fd)
(/usr/share/texlive/texmf-dist/tex/latex/ucs/ucsencs.def)
*geometry* driver: auto-detecting
*geometry* detected driver: dvips
(/usr/share/texlive/texmf-dist/tex/latex/psnfss/t1phv.fd)
(./2c666a8feb5dd27d92f3c286e7775fb6.aux) )
No pages of output.
Transcript written on 2c666a8feb5dd27d92f3c286e7775fb6.log.

And I still don't have slightest idea what's wrong with LaTeX in Matplotlib
:S


2013/3/31 Juergen Hasch <py...@el...>

> I tested it under Linux now, and I see your problem. The latex files don't
> compile cleanly, this is why you get the error. You can find the .tex files
> under ~./matplotlib/tex.cache
>
> It looks like you have a problem with the font encoding when using unicode
> characters.
> This works for me under Linux and Windows:
>
>
> import numpy as np
> import matplotlib as mpl
> mpl.rcParams['text.latex.**preamble'] = [r'\usepackage{amsmath}' ,
> r'\usepackage[T1]{fontenc}']
> mpl.rcParams['text.latex.**unicode'] = True
> mpl.rcParams['text.usetex'] = True
>
>
> import pylab as py
>
> py.axhspan(8400,8730,alpha=0.**15)
> py.title(u'Wyniki eksperymentu pomiaru gęstości ciała
> stałego',size='large',family='**serif')
> py.ylabel(r'$\text{lol}$',**size='large',family='serif')
> py.grid(True)
> py.show()
>
> Am 30.03.2013 22:15, schrieb Pawel Chojnacki:
>
>> 2013/3/30 Juergen Hasch <py...@el... <mailto:py...@el...>>
>>
>>
>>     Am 30.03.2013 16:29, schrieb Pawel Chojnacki:
>>      > Please pardon me, but what object is math.usetex attribute of? I
>> can't find it in the documentation.
>>      >
>>      > http://matplotlib.org/users/**usetex.html<http://matplotlib.org/users/usetex.html>Mentions only text.usetex.
>>      >
>>      >
>>
>>     You need to set
>>              mpl.rcParams['text.usetex'] = True
>>
>>     For text you need unicode, for latex raw encoding.
>>     To have text and latex in one line, use
>>              xlabel(u'Häallo '+r'$\varphi$'+ 'r')
>>
>>     Works for me, at least.
>>
>>
>> I've already tried that, and I got the response:
>>
>> ['', '\\usepackage{amsmath}']
>> Exception in Tkinter callback
>> Traceback (most recent call last):
>>    File "/usr/lib/python2.7/lib-tk/**Tkinter.py", line 1437, in __call__
>>      return self.func(*args)
>>    File "/usr/lib/pymodules/python2.7/**matplotlib/backends/backend_**tkagg.py",
>> line 236, in resize
>>      self.show()
>>    File "/usr/lib/pymodules/python2.7/**matplotlib/backends/backend_**tkagg.py",
>> line 239, in draw
>>      FigureCanvasAgg.draw(self)
>>    File "/usr/lib/pymodules/python2.7/**matplotlib/backends/backend_**agg.py",
>> line 421, in draw
>>      self.figure.draw(self.**renderer)
>>    File "/usr/lib/pymodules/python2.7/**matplotlib/artist.py", line 55,
>> in draw_wrapper
>>      draw(artist, renderer, *args, **kwargs)
>>    File "/usr/lib/pymodules/python2.7/**matplotlib/figure.py", line 898,
>> in draw
>>      func(*args)
>>    File "/usr/lib/pymodules/python2.7/**matplotlib/artist.py", line 55,
>> in draw_wrapper
>>      draw(artist, renderer, *args, **kwargs)
>>    File "/usr/lib/pymodules/python2.7/**matplotlib/axes.py", line 1997,
>> in draw
>>      a.draw(renderer)
>>    File "/usr/lib/pymodules/python2.7/**matplotlib/artist.py", line 55,
>> in draw_wrapper
>>      draw(artist, renderer, *args, **kwargs)
>>    File "/usr/lib/pymodules/python2.7/**matplotlib/text.py", line 526,
>> in draw
>>      bbox, info = self._get_layout(renderer)
>>    File "/usr/lib/pymodules/python2.7/**matplotlib/text.py", line 309,
>> in _get_layout
>>      ismath=ismath)
>>    File "/usr/lib/pymodules/python2.7/**matplotlib/backends/backend_**agg.py",
>> line 188, in get_text_width_height_descent
>>      renderer=self)
>>    File "/usr/lib/pymodules/python2.7/**matplotlib/texmanager.py", line
>> 606, in get_text_width_height_descent
>>      dvifile = self.make_dvi(tex, fontsize)
>>    File "/usr/lib/pymodules/python2.7/**matplotlib/texmanager.py", line
>> 351, in make_dvi
>>      texfile = self.make_tex(tex, fontsize)
>>    File "/usr/lib/pymodules/python2.7/**matplotlib/texmanager.py", line
>> 259, in make_tex
>>      fh.write(s)
>> UnicodeEncodeError: 'ascii' codec can't encode character u'\u0119' in
>> position 349: ordinal not in range(128)
>>
>> And after adding:
>> mpl.rcParams['text.latex.**preamble'].append(r'\**usepackage{amsmath},\**
>> usepackage[utf8]{inputenc}')
>> I got:
>>
>> ['', '\\usepackage{amsmath},\\**usepackage[utf8]{inputenc}']
>> Exception in Tkinter callback
>> Traceback (most recent call last):
>>    File "/usr/lib/python2.7/lib-tk/**Tkinter.py", line 1437, in __call__
>>      return self.func(*args)
>>    File "/usr/lib/pymodules/python2.7/**matplotlib/backends/backend_**tkagg.py",
>> line 236, in resize
>>      self.show()
>>    File "/usr/lib/pymodules/python2.7/**matplotlib/backends/backend_**tkagg.py",
>> line 239, in draw
>>      FigureCanvasAgg.draw(self)
>>    File "/usr/lib/pymodules/python2.7/**matplotlib/backends/backend_**agg.py",
>> line 421, in draw
>>      self.figure.draw(self.**renderer)
>>    File "/usr/lib/pymodules/python2.7/**matplotlib/artist.py", line 55,
>> in draw_wrapper
>>      draw(artist, renderer, *args, **kwargs)
>>    File "/usr/lib/pymodules/python2.7/**matplotlib/figure.py", line 898,
>> in draw
>>      func(*args)
>>    File "/usr/lib/pymodules/python2.7/**matplotlib/artist.py", line 55,
>> in draw_wrapper
>>      draw(artist, renderer, *args, **kwargs)
>>    File "/usr/lib/pymodules/python2.7/**matplotlib/axes.py", line 1997,
>> in draw
>>      a.draw(renderer)
>>    File "/usr/lib/pymodules/python2.7/**matplotlib/artist.py", line 55,
>> in draw_wrapper
>>      draw(artist, renderer, *args, **kwargs)
>>    File "/usr/lib/pymodules/python2.7/**matplotlib/axis.py", line 1042,
>> in draw
>>      ticklabelBoxes, ticklabelBoxes2 = self._get_tick_bboxes(ticks_**to_draw,
>> renderer)
>>    File "/usr/lib/pymodules/python2.7/**matplotlib/axis.py", line 993,
>> in _get_tick_bboxes
>>      extent = tick.label1.get_window_extent(**renderer)
>>    File "/usr/lib/pymodules/python2.7/**matplotlib/text.py", line 747,
>> in get_window_extent
>>      bbox, info = self._get_layout(self._**renderer)
>>    File "/usr/lib/pymodules/python2.7/**matplotlib/text.py", line 309,
>> in _get_layout
>>      ismath=ismath)
>>    File "/usr/lib/pymodules/python2.7/**matplotlib/backends/backend_**agg.py",
>> line 188, in get_text_width_height_descent
>>      renderer=self)
>>    File "/usr/lib/pymodules/python2.7/**matplotlib/texmanager.py", line
>> 606, in get_text_width_height_descent
>>      dvifile = self.make_dvi(tex, fontsize)
>>    File "/usr/lib/pymodules/python2.7/**matplotlib/texmanager.py", line
>> 371, in make_dvi
>>      string:\n%s\nHere is the full report generated by LaTeX: \n\n'%
>> repr(tex)) + report)
>> RuntimeError: LaTeX was not able to process the following string:
>> '$0.2$'
>> Here is the full report generated by LaTeX:
>>
>> This is pdfTeX, Version 3.1415926-2.4-1.40.13 (TeX Live 2012/Debian)
>>   restricted \write18 enabled.
>> entering extended mode
>> (./**d9d8962c45871ca6b62e5d3dffbe49**ab.tex
>> LaTeX2e <2011/06/27>
>> Babel <v3.8m> and hyphenation patterns for english, dumylang,
>> nohyphenation, po
>> lish, loaded.
>> (/usr/share/texlive/texmf-**dist/tex/latex/base/article.**cls
>> Document Class: article 2007/10/19 v1.4h Standard LaTeX document class
>> (/usr/share/texlive/texmf-**dist/tex/latex/base/size10.**clo))
>> (/usr/share/texlive/texmf-**dist/tex/latex/type1cm/**type1cm.sty)
>> (/usr/share/texlive/texmf-**dist/tex/latex/psnfss/helvet.**sty
>> (/usr/share/texlive/texmf-**dist/tex/latex/graphics/**keyval.sty))
>> (/usr/share/texlive/texmf-**dist/tex/latex/psnfss/courier.**sty)
>> (/usr/share/texlive/texmf-**dist/tex/latex/base/textcomp.**sty
>> (/usr/share/texlive/texmf-**dist/tex/latex/base/ts1enc.**def))
>> (/usr/share/texlive/texmf-**dist/tex/latex/amsmath/**amsmath.sty
>> For additional information on amsmath, use the `?' option.
>> (/usr/share/texlive/texmf-**dist/tex/latex/amsmath/**amstext.sty
>> (/usr/share/texlive/texmf-**dist/tex/latex/amsmath/amsgen.**sty))
>> (/usr/share/texlive/texmf-**dist/tex/latex/amsmath/amsbsy.**sty)
>> (/usr/share/texlive/texmf-**dist/tex/latex/amsmath/amsopn.**sty))
>>
>> ! LaTeX Error: Missing \begin{document}.
>>
>> See the LaTeX manual or LaTeX Companion for explanation.
>> Type  H <return>  for immediate help.
>>   ...
>>
>> l.9 \usepackage{amsmath},
>>                           \usepackage[utf8]{inputenc}
>> (/usr/share/texlive/texmf-**dist/tex/latex/base/inputenc.**sty
>> (/usr/share/texlive/texmf-**dist/tex/latex/base/utf8.def
>> (/usr/share/texlive/texmf-**dist/tex/latex/base/t1enc.dfu)
>> (/usr/share/texlive/texmf-**dist/tex/latex/base/ot1enc.**dfu)
>> (/usr/share/texlive/texmf-**dist/tex/latex/base/omsenc.**dfu)
>> (/usr/share/texlive/texmf-**dist/tex/latex/base/ts1enc.**dfu)))
>> (/usr/share/texlive/texmf-**dist/tex/latex/geometry/**geometry.sty
>> (/usr/share/texlive/texmf-**dist/tex/generic/oberdiek/**ifpdf.sty)
>> (/usr/share/texlive/texmf-**dist/tex/generic/oberdiek/**ifvtex.sty)
>> (/usr/share/texlive/texmf-**dist/tex/generic/ifxetex/**ifxetex.sty)
>>
>> Package geometry Warning: Over-specification in `h'-direction.
>>      `width' (5058.9pt) is ignored.
>>
>>
>> Package geometry Warning: Over-specification in `v'-direction.
>>      `height' (5058.9pt) is ignored.
>>
>> )
>> No file d9d8962c45871ca6b62e5d3dffbe49**ab.aux.
>> (/usr/share/texlive/texmf-**dist/tex/latex/base/ts1cmr.fd)
>> (/usr/share/texlive/texmf-**dist/tex/latex/psnfss/ot1pnc.**fd)
>> *geometry* driver: auto-detecting
>> *geometry* detected driver: dvips
>> (/usr/share/texlive/texmf-**dist/tex/latex/psnfss/ot1phv.**fd) [1]
>> (./**d9d8962c45871ca6b62e5d3dffbe49**ab.aux) )
>> (see the transcript file for additional information)
>> Output written on d9d8962c45871ca6b62e5d3dffbe49**ab.dvi (1 page, 340
>> bytes).
>> Transcript written on d9d8962c45871ca6b62e5d3dffbe49**ab.log.
>>
>> And I really don't get what's happening :S
>>
>
>