Problem using TeX formatting in labels

Hi Brian,

I wouldn't doubt that this is a path issue. The other path issues
that I've had installing python and then the requisite libraries seems
to be endless. I'm using Mac OSX.4, a Powerbook but not an
Intel-based Mac (as far as I know... its several years old).

My ~/.profile is actually empty. A while ago, I left a note in this
file that all of the terminals are controlled by the /etc/bashrc file.
I tried sourcing this file, but to no avail.

It appears that I need to add LaTeX, dvipng, and ghostscript to my
path. I installed LaTeX and ghostscript using iInstaller and run TeX
through a front end (AlphaX) that does all of the typesetting for me,
so I'm woefully ignorant of the paths for any of these utilities. I
installed dvipng very recently, so I assume it went to the default
location. I have two questions:
1) How do I determine the paths of these utilities?
and
2) How do I add them to the PATH variable? Should I put this in a
configuration file somewhere so that I don't have to do this
repeatedly?

Thanks for the quick responses, and sorry about the ignorant questions,
Adrian

···

On 4/5/07, Brian Donovan <donovan@...880...> wrote:

Adrian,

   This may be a path issue. I have found that xterm or gnome-
terminal are not started as login shells and therefor the .profile
file (for bash) is not read. This caused my path to be incorrect. You
can run 'source ~/.profile' when you start to get the paths setup
correctly. You can also edit the X11 xinitrc to get xterm to start as
a login shell.

Brian

On Apr 5, 2007, at 9:01 AM, Adrian Down wrote:

> Hello,
>
> I am getting an error when I try to use any TeX formatting in plot
> labels. There is an example below. I don't know if its relevant, but
> I can only use the "latex" command in my OSX terminal. If I try
> "latex sample.tex" in an x11 window, x11 claims no knowledge of latex.
>
> I have had to install two libraries and hunt down my kpathsea library,
> and this still isn't working. Is there any easier way to achieve text
> and math together in a label, such as "Text $\pi$" ? Thanks,
>
> Adrian
>
> In [1]: matplotlib.rc('text', usetex=True)
>
> In [2]: plot(arange(3), arange(3));xlabel('Text')
> sh: line 1: latex: command not found
> ----------------------------------------------------------------------
> -----
> exceptions.RuntimeError Traceback (most
> recent call last)
>
> /Users/adrian/Documents/Academic/Courses/Research/Cosmo/Code/
> <ipython console>
>
> /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
> site-packages/matplotlib/pylab.py
> in plot(*args, **kwargs)
> 3089 try:
> 3090 ret = gca().plot(*args, **kwargs)
> -> 3091 draw_if_interactive()
> 3092 except:
> 3093 hold(b)
>
> /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
> site-packages/IPython/genutils.py
> in wrapper(*args, **kw)
> 742 def wrapper(*args,**kw):
> 743 wrapper.called = False
> --> 744 out = func(*args,**kw)
> 745 wrapper.called = True
> 746 return out
>
> /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
> site-packages/matplotlib/backends/backend_tkagg.py
> in draw_if_interactive()
> 57 figManager = Gcf.get_active()
> 58 if figManager is not None:
> ---> 59 figManager.show()
> 60
> 61
>
> /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
> site-packages/matplotlib/backends/backend_tkagg.py
> in show(self)
> 303 if sys.platform=='win32' : self.window.update()
> 304 else:
> --> 305 self.canvas.draw()
> 306 self._shown = True
> 307
>
> /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
> site-packages/matplotlib/backends/backend_tkagg.py
> in draw(self)
> 152
> 153 def draw(self):
> --> 154 FigureCanvasAgg.draw(self)
> 155 tkagg.blit(self._tkphoto, self.renderer._renderer,
> colormode=2)
> 156 self._master.update_idletasks()
>
> /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
> site-packages/matplotlib/backends/backend_agg.py
> in draw(self)
> 390
> 391 renderer = self.get_renderer()
> --> 392 self.figure.draw(renderer)
> 393
> 394 def get_renderer(self):
>
> /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
> site-packages/matplotlib/figure.py
> in draw(self, renderer)
> 542
> 543 # render the axes
> --> 544 for a in self.axes: a.draw(renderer)
> 545
> 546 # render the figure text
>
> /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
> site-packages/matplotlib/axes.py
> in draw(self, renderer, inframe)
> 1070
> 1071 for zorder, i, a in dsu:
> -> 1072 a.draw(renderer)
> 1073
> 1074 self.transData.thaw() # release the lazy objects
>
> /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
> site-packages/matplotlib/axis.py
> in draw(self, renderer, *args, **kwargs)
> 559 tick.set_label1(label)
> 560 tick.set_label2(label)
> --> 561 tick.draw(renderer)
> 562 if tick.label1On and tick.label1.get_visible():
> 563 extent = tick.label1.get_window_extent
> (renderer)
>
> /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
> site-packages/matplotlib/axis.py
> in draw(self, renderer)
> 159 if self.tick2On: self.tick2line.draw(renderer)
> 160
> --> 161 if self.label1On: self.label1.draw(renderer)
> 162 if self.label2On: self.label2.draw(renderer)
> 163
>
> /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
> site-packages/matplotlib/text.py
> in draw(self, renderer)
> 836 def draw(self, renderer):
> 837 self.update_coords(renderer)
> --> 838 Text.draw(self, renderer)
> 839 if self.get_dashlength() > 0.0:
> 840 self.dashline.draw(renderer)
>
> /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
> site-packages/matplotlib/text.py
> in draw(self, renderer)
> 338
> 339 return
> --> 340 bbox, info = self._get_layout(renderer)
> 341
> 342 if ismath=='TeX':
>
> /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
> site-packages/matplotlib/text.py
> in _get_layout(self, renderer)
> 185 heightt += 3 # 3 pixel pad
> 186 for line in lines:
> --> 187 w,h = renderer.get_text_width_height(
> 188 line, self._fontproperties,
> ismath=self.is_math_text())
> 189
>
> /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
> site-packages/matplotlib/backends/backend_agg.py
> in get_text_width_height(self, s, prop, ismath, rgb)
> 238 size = prop.get_size_in_points()
> 239 texmanager = self.get_texmanager()
> --> 240 Z = texmanager.get_rgba(s, size, self.dpi.get
> (), rgb)
> 241 m,n,tmp = Z.shape
> 242 return n,m
>
> /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
> site-packages/matplotlib/texmanager.py
> in get_rgba(self, tex, fontsize, dpi, rgb)
> 327 if Z is None:
> 328 # force=True to skip cacheing while debugging
> --> 329 pngfile = self.make_png(tex, fontsize, dpi,
> force=False)
> 330 X = readpng(os.path.join(self.texcache, pngfile))
> 331
>
> /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
> site-packages/matplotlib/texmanager.py
> in make_png(self, tex, fontsize, dpi, force)
> 242 # see get_rgba for a discussion of the background
> 243 if force or not os.path.exists(pngfile):
> --> 244 dvifile = self.make_dvi(tex, fontsize)
> 245 outfile = basefile+'.output'
> 246 command = self.get_shell_cmd('cd "%s"' %
> self.texcache,
>
> /Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/
> site-packages/matplotlib/texmanager.py
> in make_dvi(self, tex, fontsize, force)
> 223 fh = file(outfile)
> 224 if exit_status:
> --> 225 raise RuntimeError('LaTeX was not able to
> process the flowing \
> 226 string:\n%s\nHere is the full report generated by LaTeX:
> \n\n'% tex + fh.read())
> 227 else: verbose.report(fh.read(), 'debug')
>
> RuntimeError: LaTeX was not able to process the flowing string:
> $0.0$
> Here is the full report generated by LaTeX:
>
> ----------------------------------------------------------------------
> ---
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Brian Donovan
--
Research Assistant
CASA ERC
Microwave Remote Sensing Lab
donovan@...880...