matplotlib-users Mailing List for matplotlib

On Mon, Aug 15, 2011 at 10:00 PM, Damon McDougall
<D.M...@wa...> wrote:
> Hi Jeff,
>
> I am able to run the tex_demo.py with no problems and I can create
>
> output files using the Agg backend.  When I try to use the PDF
>
> backend, however, I get an error which stems from dviread.py (pasted
>
> below).  Any thoughts on what could be going wrong?
>
> Thanks!
>
> Jeff
>
> Hi Jeff,
>
> How did you install matplotlib? From source yourself?
>
> No, I'm using the Enthought Python Distribution (EPD64).
>
> And when you installed matplotlib, did it see that you had dvipng installed?
> FYI, you can do
> which dvipng
> to return the path where dvipng lives (if it is in your path already) or you
> can do
> locate dvipng
> to do a search for the binary if it isn't already in your path.
> P.S. You forgot to reply-all so everyone can see your response.

$ which dvipng
/usr/texbin/dvipng

I don't remember any complaints while running the EPD installer.
Would there be a way to check this?  Is the problem definitely related
to an inability to find dvipng, or could there be other possibilities?

Thanks,
Jeff

I just wanted to add that I'm getting the exact same error.  On a fresh, new
iMac running 10.6.8, I installed ActivePython 2.6, along with matplotlib for
2.6 on OSX.

Running example code from the matplotlib website, I get the same error-- 
the window appears with the resizing tools but otherwise blank, and the
program throws the listed Tcl error.  

Any ideas?

Thank you for your help,

Andrew


Nate Gallagher wrote:
> 
> Please help.
> -Nate
> 
> 
> ----- Forwarded Message ----
>> From: Nate Gallagher <nat...@ya...>
>> To: mat...@li...
>> Sent: Mon, March 28, 2011 2:41:39 PM
>> Subject: [Matplotlib-users] Plot show() errors, Mac OS 10.6
>> 
>> operating system
>> $ uname -a
>> Darwin nate-gallaghers-macbook-pro.local  10.6.0 Darwin Kernel Version
>> 10.6.0: 
> 
>> Wed Nov 10 18:13:17 PST 2010;  root:xnu-1504.9.26~3/RELEASE_I386 i386
>> 
>> matplotlib  version:
>> matplotlib-1.0.1-python.org-32bit-py2.7-macosx10.3.dmg
>> 
>> obtained from:
>> http://sourceforge.net/projects/matplotlib/files/matplotlib/matplotlib-1.0.1/
>> 
>> no o customizations to matplotlibrc
>> 
>> $ python simple_plot.py --verbose-helpful
>> 
>> $HOME=/Users/ibook
>> CONFIGDIR=/Users/ibook/.matplotlib
>> matplotlib  data path 
>>/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/mpl-data
>>a
>> 
>> loaded  rc file 
>>/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/mpl-data/matplotlibrc
>>c
>> 
>> matplotlib  version 1.0.1
>> verbose.level helpful
>> interactive is False
>> units is  False
>> platform is darwin
>> Using fontManager instance from  /Users/ibook/.matplotlib/fontList.cache
>> backend TkAgg version  8.5
>> findfont: Matching 
>>:family=sans-serif:style=normal:variant=normal:weight=normal:stretch=normal:size=medium
>>m
>>   to Bitstream Vera Sans 
>>(/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/mpl-data/fonts/ttf/Vera.ttf)
>>)
>>   with score of 0.000000
>> Exception in Tkinter callback
>> Traceback (most  recent call last):
>>   File 
>>"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk/Tkinter.py",
>>,
>>   line 1410, in __call__
>>     return self.func(*args)
>>   File 
>>"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/backends/backend_tkagg.py",
>>,
>>   line 245, in resize
>>     self.show()
>>   File 
>>"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/backends/backend_tkagg.py",
>>,
>>   line 249, in draw
>>     tkagg.blit(self._tkphoto,  self.renderer._renderer, colormode=2)
>>   File 
>>"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/backends/tkagg.py",
>>,
>>   line 19, in blit
>>     tk.call("PyAggImagePhoto", photoimage,  id(aggimage), colormode, 
>> id(bbox_array))
>> TclError
>> 
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-- 
View this message in context: http://old.nabble.com/Window-appears%2C-no-graph-drawn-Fw%3A--Plot-show%28%29-errors%2C-Mac-OS-10.6-tp31279007p32267934.html
Sent from the matplotlib - users mailing list archive at Nabble.com.

>> Hi Jeff,
>> 
>> I am able to run the tex_demo.py with no problems and I can create
>> output files using the Agg backend.  When I try to use the PDF
>> backend, however, I get an error which stems from dviread.py (pasted
>> below).  Any thoughts on what could be going wrong?
>> 
>> Thanks!
>> Jeff
>> 
>> Hi Jeff,
>> How did you install matplotlib? From source yourself?
> 
> No, I'm using the Enthought Python Distribution (EPD64).

And when you installed matplotlib, did it see that you had dvipng installed?

FYI, you can do

which dvipng

to return the path where dvipng lives (if it is in your path already) or you can do

locate dvipng

to do a search for the binary if it isn't already in your path.

P.S. You forgot to reply-all so everyone can see your response.

Damon McDougall
d.m...@wa...
http://damon.is-a-geek.com
B2.39
Mathematics Institute
Coventry
West Midlands
CV4 7AL

Hi
Is there a simple way to do the following

l1=Line2D(xdata=[1,2,3],ydata=[4,5,6])

l2=Line2D(xdata = [1].ydata=[3])

if l2 in l1 #error, Line2D not iterable


-Mathew

Hello all,

I am running Mac OS X 10.7 Lion with matplotlib 1.0.1 and the MacTex
2011 distrubution.

I am able to run the tex_demo.py with no problems and I can create
output files using the Agg backend.  When I try to use the PDF
backend, however, I get an error which stems from dviread.py (pasted
below).  Any thoughts on what could be going wrong?

Thanks!
Jeff

|| Jeff Klukas
|| Research Assistant (Physics), University of Wisconsin
|| jeff.klukas@gmail | jeffyklukas@aim | jeffklukas@skype
|| http://hep.wisc.edu/~jklukas/



Traceback (most recent call last):
  File "tex_demo.py", line 32, in <module>
    savefig('tex_demo')
  File "/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/matplotlib/pyplot.py",
line 363, in savefig
    return fig.savefig(*args, **kwargs)
  File "/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/matplotlib/figure.py",
line 1084, in savefig
    self.canvas.print_figure(*args, **kwargs)
  File "/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/matplotlib/backend_bases.py",
line 1923, in print_figure
    **kwargs)
  File "/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/matplotlib/backends/backend_pdf.py",
line 2156, in print_pdf
    self.figure.draw(renderer)
  File "/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/matplotlib/artist.py",
line 55, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/matplotlib/figure.py",
line 798, in draw
    func(*args)
  File "/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/matplotlib/artist.py",
line 55, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/matplotlib/axes.py",
line 1946, in draw
    a.draw(renderer)
  File "/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/matplotlib/artist.py",
line 55, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/matplotlib/axis.py",
line 1017, in draw
    tick.draw(renderer)
  File "/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/matplotlib/artist.py",
line 55, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/matplotlib/axis.py",
line 234, in draw
    self.label1.draw(renderer)
  File "/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/matplotlib/artist.py",
line 55, in draw_wrapper
    draw(artist, renderer, *args, **kwargs)
  File "/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/matplotlib/text.py",
line 571, in draw
    self._fontproperties, angle)
  File "/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/matplotlib/backends/backend_pdf.py",
line 1549, in draw_tex
    psfont = self.tex_font_mapping(dvifont.texname)
  File "/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/matplotlib/backends/backend_pdf.py",
line 1365, in tex_font_mapping
    dviread.PsfontsMap(dviread.find_tex_file('pdftex.map'))
  File "/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/matplotlib/dviread.py",
line 668, in __init__
    self._parse(file)
  File "/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/matplotlib/dviread.py",
line 701, in _parse
    self._register(words)
  File "/Library/Frameworks/EPD64.framework/Versions/7.1/lib/python2.7/site-packages/matplotlib/dviread.py",
line 727, in _register
    assert encoding is None
AssertionError

From: David Just [mailto:Jus...@ma...] 
Sent: Friday, August 12, 2011 11:05
 
Now that I'm pre-building all my enlarged interpolated images to scroll
through,  I'm having trouble forcing the figure/FigureCanvas to be the size I
want.

I'm trying: 
fig.set_size_inches(768 / 72.0, 768 / 72.0),  but it ends up the same size as
the default plot.

If the issue is that the GUI window is not changing size, try adding
"forward=True" to the set_size_inches call.

It looks like it isn't finding the Computer Modern Bakoma fonts.  They 
don't seem to be included in the Fedora Package (see here: 
http://koji.fedoraproject.org/koji/buildinfo?buildID=230966) and the 
package does not depend on those fonts.  Some of them are packaged in 
the lyx-fonts package, so installing that may help.  But basically this 
is a packaging bug -- the package should either include the fonts or 
depend on the fonts.  It might be a good idea to file a bug against the 
python-matplotlib package in the Fedora bug tracker.

Mike

On 08/15/2011 07:05 AM, Neal Becker wrote:
> Fedora f15.  What am I missing that causes this?
>
> /usr/lib64/python2.7/site-packages/matplotlib/font_manager.py:1242: UserWarning:
> findfont: Font family ['cmb10'] not found. Falling back to Bitstream Vera Sans
>    (prop.get_family(), self.defaultFamily[fontext]))
> /usr/lib64/python2.7/site-packages/matplotlib/font_manager.py:1252: UserWarning:
> findfont: Could not match :family=Bitstream Vera
> Sans:style=normal:variant=normal:weight=normal:stretch=normal:size=12. Returning
> /usr/share/fonts/texlive-gfsdidot/GFSDidotBold.otf
>    UserWarning)
> /usr/lib64/python2.7/site-packages/matplotlib/font_manager.py:1242: UserWarning:
> findfont: Font family ['cmtt10'] not found. Falling back to Bitstream Vera Sans
>    (prop.get_family(), self.defaultFamily[fontext]))
> /usr/lib64/python2.7/site-packages/matplotlib/font_manager.py:1242: UserWarning:
> findfont: Font family ['cmss10'] not found. Falling back to Bitstream Vera Sans
>    (prop.get_family(), self.defaultFamily[fontext]))
>
>
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On 08/14/2011 11:28 AM, Vlastimil Brom wrote:
> ####################################################
>
> Regarding wxagg, it seems, that the suggestion about unsuitable fonts
> being used was correct;
> after setting the font to Arial, adapted from:
> http://matplotlib.sourceforge.net/examples/api/font_family_rc.html
> all the characters in the title are displayed ok.
>
> ####################################################
> #! Python
> # -*- coding: utf-8 -*-
>
> import wxversion
> wxversion.select('2.9.2') # 2.9.2.1
> import wx
>
> # setting the font to Arial - the title is displayed completely;
> # with the default font only the "latin-1" characters are shown
> from matplotlib import rcParams
> rcParams['font.family'] = 'sans-serif'
> rcParams['font.sans-serif'] = ['Arial'] + rcParams['font.sans-serif']
> #
>
> import matplotlib
> matplotlib.use('WXAgg')
> import pylab
>
> pylab.plot(range(3), range(3))
> pylab.title(u"abcd áčďéěíňóřšťúůýž äöüß ê αβγδ абвгд אבגד xyz")
> pylab.show()
>
> ####################################################
>   (using python 2.7.2, MPL 1.0.1; Win 7, Czech)
>
> Is there maybe some machanism available in matplotlib, which would
> select the appropriate font for the given characters? (Like in wx or,
> even more powerful in tk?) Or is it the expected way to set the
> suitable font individually, as only the font list in rcParams are
> tried sequentially - regardless of the character support?
That's correct: matplotlib doesn't currently do this.  It renders a 
particular string of text with a single font and does not do font 
substitution for characters that are not in that font.  The best 
practice is to use a font that contains the full set of characters, such 
as Arial or Deja Vu as you've discovered.

There a lot of other i18n shortcomings to the way matplotlib supports 
text (such as a lack of bidi support).  That's a large wheel to 
reinvent, so the solution would involve using a third-party text layout 
library such as pango, but I know there is licensing friction against 
that.  It may be worth revisiting that at some point.

Mike

Looks like this is fixed by:

mathtext.fontset: stix

Neal Becker wrote:

> Fedora f15.  What am I missing that causes this?
> 
> /usr/lib64/python2.7/site-packages/matplotlib/font_manager.py:1242:
> UserWarning: findfont: Font family ['cmb10'] not found. Falling back to
> Bitstream Vera Sans
>   (prop.get_family(), self.defaultFamily[fontext]))
> /usr/lib64/python2.7/site-packages/matplotlib/font_manager.py:1252:
> UserWarning: findfont: Could not match :family=Bitstream Vera
> Sans:style=normal:variant=normal:weight=normal:stretch=normal:size=12.
> Returning /usr/share/fonts/texlive-gfsdidot/GFSDidotBold.otf
>   UserWarning)
> /usr/lib64/python2.7/site-packages/matplotlib/font_manager.py:1242:
> UserWarning: findfont: Font family ['cmtt10'] not found. Falling back to
> Bitstream Vera Sans
>   (prop.get_family(), self.defaultFamily[fontext]))
> /usr/lib64/python2.7/site-packages/matplotlib/font_manager.py:1242:
> UserWarning: findfont: Font family ['cmss10'] not found. Falling back to
> Bitstream Vera Sans
>   (prop.get_family(), self.defaultFamily[fontext]))
> 
> 
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> uberSVN's rich system and user administration capabilities and model
> configuration take the hassle out of deploying and managing Subversion and
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Fedora f15.  What am I missing that causes this?

/usr/lib64/python2.7/site-packages/matplotlib/font_manager.py:1242: UserWarning: 
findfont: Font family ['cmb10'] not found. Falling back to Bitstream Vera Sans
  (prop.get_family(), self.defaultFamily[fontext]))
/usr/lib64/python2.7/site-packages/matplotlib/font_manager.py:1252: UserWarning: 
findfont: Could not match :family=Bitstream Vera 
Sans:style=normal:variant=normal:weight=normal:stretch=normal:size=12. Returning 
/usr/share/fonts/texlive-gfsdidot/GFSDidotBold.otf
  UserWarning)
/usr/lib64/python2.7/site-packages/matplotlib/font_manager.py:1242: UserWarning: 
findfont: Font family ['cmtt10'] not found. Falling back to Bitstream Vera Sans
  (prop.get_family(), self.defaultFamily[fontext]))
/usr/lib64/python2.7/site-packages/matplotlib/font_manager.py:1242: UserWarning: 
findfont: Font family ['cmss10'] not found. Falling back to Bitstream Vera Sans
  (prop.get_family(), self.defaultFamily[fontext]))