matplotlib-users

[Matplotlib-users] New user of matplotlib : some problem with version 0.62.4

[Jean P. <2s...@ma...>]

Hello,

I'm a new user of matplotlib and I have to admit that I'm quite
impressed and excited about it !
I'm currently trying to convince the whole company to switch from matlab
to python (at least 200 users I think), and matplotlib is a big asset.

If it's a success, as a big supporter of free software, I hope to
convince the company to make some donations to python and/or
matplotlib...(matlab licence are really expensive...)

Anyway, at the moment I can't make any donation, but I can at least help
to improve matplotlib, so here are the problems I've found :

I began with version 0.60.2 and everything worked out of the box with
either linux or windows NT4.
But when trying to display several plot on the same window, I had some
text overlapping so after a while I've decided to switch to 0.62.4 to
see if things has improved.

But it seems that everything was broken ! I cannot even display a
simple plot on windows NT4 or linux.
On windows I use the enthought edition python-2.3.3-1057 and on linux I
was using the latest (python 2.3.4, wxPython 2.5.2.7, numarray 1.0,
Numeric 23.3...).

Here is the output on linux when I try to use the simple_plot.py :

******************************************************************
Extra content at the end of the document
Could not load filename for text
/users/m024234/local/share/matplotlib/Vera.ttf
Traceback (most recent call last):
  File
"/usr/local/lib/python2.3/site-packages/matplotlib/ba
ckends/backend_gtkagg.py", line 85, in callback
    else: self.draw()
  File
"/usr/local/lib/python2.3/site-packages/matplotlib/ba
ckends/backend_gtkagg.py", line 40, in draw
    FigureCanvasAgg.draw(self)
  File
"/usr/local/lib/python2.3/site-packages/matplotlib/ba
ckends/backend_agg.py", line 307, in draw
    self.figure.draw(self.renderer)
  File
"/usr/local/lib/python2.3/site-packages/matplotlib/figure.py",
 line 238, in draw
    for a in self.axes: a.draw(renderer)
  File
"/usr/local/lib/python2.3/site-packages/matplotlib/axes.py",
 line 692, in draw
    self.xaxis.draw(renderer)
  File
"/usr/local/lib/python2.3/site-packages/matplotlib/ax is.py",
 line 475, in draw
    tick.draw(renderer)
  File
"/usr/local/lib/python2.3/site-packages/matplotlib/axis.py",
 line 136, in draw
    if self.label1On: self.label1.draw(renderer)
  File
"/usr/local/lib/python2.3/site-packages/matplotlib/text.py",
 line 207, in draw
    bbox, info = self._get_layout(renderer)
  File
"/usr/local/lib/python2.3/site-packages/matplotlib/text.py",
 line 106, in _get_layout
    w,h = renderer.get_text_width_height(
  File
"/usr/local/lib/python2.3/site-packages/matplotlib/backends/backend_agg
.py", line 211, in get_text_width_height
    font.set_text(s, 0.0)  # the width and height of unrotated string
AttributeError: 'NoneType' object has no attribute 'set_text'
******************************************************************

Let me know if I can do anything to help you understand the problem... 

Anyway, great software !

Regards,

Re: [Matplotlib-users] New user of matplotlib : some problem with version 0.62.4

[Alan G I. <ai...@am...>]

On Mon, 6 Sep 2004, Jean Pierre apparently wrote:
> I've decided to switch to 0.62.4 
...
> But it seems that everything was broken ! I cannot even display a
> simple plot on windows NT4 or linux.
> On windows I use the enthought edition python-2.3.3-1057 and on linux I
> was using the latest (python 2.3.4, wxPython 2.5.2.7, numarray 1.0,
> Numeric 23.3...).
> Here is the output on linux when I try to use the simple_plot.py :
> ******************************************************************
> Extra content at the end of the document
> Could not load filename for text
> /users/m024234/local/share/matplotlib/Vera.ttf

i. It looks like a missing font?
ii. Another possibility:
http://matplotlib.sourceforge.net/faq.html#FREEZE

hth,
Alan Isaac

Re: [Matplotlib-users] New user of matplotlib : some problem with version 0.62.4

[John H. <jdh...@ac...>]

>>>>> "Jean" == Jean Pierre <2s...@ma...> writes:

    Jean> Hello, I'm a new user of matplotlib and I have to admit that
    Jean> I'm quite impressed and excited about it !  I'm currently
    Jean> trying to convince the whole company to switch from matlab
    Jean> to python (at least 200 users I think), and matplotlib is a
    Jean> big asset.

Good luck - is yours a software company?  200 new developers would be
a big help :-)

    Jean> Extra content at the end of the document Could not load
    Jean> filename for text
    Jean> /users/m024234/local/share/matplotlib/Vera.ttf Traceback

Here is your problem.  The font is not being loaded.  First, in
matplotlib/backends/backend_agg.py on or around line 240, replace the
block

        if font is None:
            fname = fontManager.findfont(prop)
            try: font = FT2Font(str(fname))
            except RuntimeError, msg:
                print >> sys.stderr, 'Could not load filename for text', \
                      fname
                return None
            else:
                _fontd[key] = font

with

        if font is None:
            fname = fontManager.findfont(prop)
            font = FT2Font(str(fname))
            _fontd[key] = font

in other words, don't catch the exception.  This may give you extra
information about what is going wrong.

I notice from your path above that you have installed matplotlib in a
nonstandard location.  Have you set the MATPLOTLIB environment
variable, as described in the installing documentation on the web page
http://matplotlib.sf.net/installing.html?

Do you get the same traceback on win32?

Gladly-accepting-donationsly-yours,
JDH

Re: [Matplotlib-users] New user of matplotlib : some problem with version 0.62.4

[Jean P. <2s...@ma...>]

>     Jean> Hello, I'm a new user of matplotlib and I have to admit that
>     Jean> I'm quite impressed and excited about it !  I'm currently
>     Jean> trying to convince the whole company to switch from matlab
>     Jean> to python (at least 200 users I think), and matplotlib is a
>     Jean> big asset.
> 
> Good luck - is yours a software company?  200 new developers would be
> a big help :-)

No, we mainly use matlab for our own studies. But you can be sure that I
will report any bugs that we found.

> 
>     Jean> Extra content at the end of the document Could not load
>     Jean> filename for text
>     Jean> /users/m024234/local/share/matplotlib/Vera.ttf Traceback
> 
> Here is your problem.  The font is not being loaded.  First, in

Ah ! *slap forehead*

I found a ".ttffont.cache." in my home directory which was the remnants
of a previous installation. Inside was the old path to the font
directory. I deleted this file, and a new one with the good path was
created and everything run smoothly now.


> I notice from your path above that you have installed matplotlib in a
> nonstandard location.  Have you set the MATPLOTLIB environment
> variable, as described in the installing documentation on the web page
> http://matplotlib.sf.net/installing.html?

??? I never set the matplotlib environment and so far everything works
fine (even if I always use non standard location !)...

> Do you get the same traceback on win32?

No the problem was entirely different.
I was using the enthought python 2.3.3 with the IDE SPE 0.5.1d, and when
under SPE I tried to run a program as simple as :
from matplotlib.matlab import *
subplot(2,3,5)
show()

A screen with weird color appeared, and everything froze.

Now If I tried to run the same program directly from command-line (say
from a DOS window), everything works fine.

Is there some problem with SPE ?
It's strange because it was ok with the 0.60.2 version of matplotlib

Let me know if I can do anything to further investigate the problem...

> Gladly-accepting-donationsly-yours,
> JDH

I really really hope to convince them to give you something (not yet
thought, I still have to convince them to switch to python/matplotlib).
At least to show you that someone outside appreciate the software and
that it's worth continuing the project...

Thanks for your help !

Regards,