Hi,
I am a newbie in matplotlib. I want to use the following label (in latex)
\langle \partial_x U(x) \rangle.
When i use
ylabel(r"$\langle \partial_x U(x) \rangle$",fontsize=30);
matplotlib complains by saying
Traceback (most recent call last):
File
"/usr/lib/python2.3/site-packages/matplotlib/backends/backend_gtk.py", line
277, in expose_event
self._render_figure(width, height)
File
"/usr/lib/python2.3/site-packages/matplotlib/backends/backend_gtkagg.py",
line 91, in _render_figure
FigureCanvasAgg.draw(self)
File
"/usr/lib/python2.3/site-packages/matplotlib/backends/backend_agg.py", line
369, in draw
self.figure.draw(renderer)
File "/usr/lib/python2.3/site-packages/matplotlib/figure.py", line 498, in
draw
for a in self.axes: a.draw(renderer)
File "/usr/lib/python2.3/site-packages/matplotlib/axes.py", line 1362, in
draw
self.yaxis.draw(renderer)
File "/usr/lib/python2.3/site-packages/matplotlib/axis.py", line 578, in
draw
self.label.draw(renderer) # memory leak here, vertical text
File "/usr/lib/python2.3/site-packages/matplotlib/text.py", line 334, in
draw
bbox, info = self._get_layout(renderer)
File "/usr/lib/python2.3/site-packages/matplotlib/text.py", line 179, in
_get_layout
w,h = renderer.get_text_width_height(
File
"/usr/lib/python2.3/site-packages/matplotlib/backends/backend_agg.py", line
242, in get_text_width_height
width, height, fonts = math_parse_s_ft2font(
File "/usr/lib/python2.3/site-packages/matplotlib/mathtext.py", line 1222,
in math_parse_s_ft2font
handler.expr.set_size_info(fontsize, dpi)
File "/usr/lib/python2.3/site-packages/matplotlib/mathtext.py", line 870,
in set_size_info
self.elements[0].set_size_info(self._scale*fontsize, dpi)
File "/usr/lib/python2.3/site-packages/matplotlib/mathtext.py", line 795,
in set_size_info
Element.set_size_info(self, fontsize, dpi)
File "/usr/lib/python2.3/site-packages/matplotlib/mathtext.py", line 708,
in set_size_info
element.set_size_info(self.fontsize, dpi)
File "/usr/lib/python2.3/site-packages/matplotlib/mathtext.py", line 796,
in set_size_info
self.metrics = Element.fonts.get_metrics(
File "/usr/lib/python2.3/site-packages/matplotlib/mathtext.py", line 409,
in get_metrics
cmfont, metrics, glyph, offset = \
File "/usr/lib/python2.3/site-packages/matplotlib/mathtext.py", line 429,
in _get_info
raise ValueError('unrecognized symbol "%s"' % sym)
ValueError: unrecognized symbol "\partial"
I searched the forum for something similar and could not find anything.
Also my latex can typeset the above if i run it in a separate tex file. I
am using the GTKAgg backend.
Could someone please help me out?
Bye
Vijay
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