#18015: Empty graph latex fails
----------------------------+----------------------------
Reporter: vbraun | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.6
Component: graph theory | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
----------------------------+----------------------------
{{{
sage: Graph()
Graph on 0 vertices
sage: view(Graph())
---------------------------------------------------------------------------
UnboundLocalError Traceback (most recent call
last)
<ipython-input-5-2dc28ec90e82> in <module>()
----> 1 view(Graph())
/mnt/disk/home/release/Sage/local/lib/python2.7/site-
packages/sage/misc/latex.pyc in view(objects, title, debug, sep, tiny,
pdflatex, engine, viewer, tightpage, mode, combine_all, **kwds)
2160 else:
2161 latex_options = {}
-> 2162 s = _latex_file_(objects, title=title, sep=sep, tiny=tiny,
debug=debug, **latex_options)
2163 if engine is None:
2164 engine = _Latex_prefs._option["engine"]
/mnt/disk/home/release/Sage/local/lib/python2.7/site-
packages/sage/misc/latex.pyc in _latex_file_(objects, title, debug, sep,
tiny, math_left, math_right, extra_preamble)
1770 for i in range(len(objects)):
1771 x = objects[i]
-> 1772 L = latex(x)
1773 if not '\\begin{verbatim}' in L:
1774 s += '%s%s%s'%(math_left, L, math_right)
/mnt/disk/home/release/Sage/local/lib/python2.7/site-
packages/sage/misc/latex.pyc in __call__(self, x, combine_all)
918 """
919 if has_latex_attr(x):
--> 920 return LatexExpr(x._latex_())
921 try:
922 f = latex_table[type(x)]
/mnt/disk/home/release/Sage/local/lib/python2.7/site-
packages/sage/graphs/generic_graph.pyc in _latex_(self)
715 setup_latex_preamble()
716
--> 717 return self.latex_options().latex()
718
719 def _matrix_(self, R=None):
/mnt/disk/home/release/Sage/local/lib/python2.7/site-
packages/sage/graphs/graph_latex.pyc in latex(self)
1301 format = self.get_option('format')
1302 if format == "tkz_graph":
-> 1303 return self.tkz_picture()
1304 elif format == "dot2tex":
1305 return self.dot2tex_picture()
/mnt/disk/home/release/Sage/local/lib/python2.7/site-
packages/sage/graphs/graph_latex.pyc in tkz_picture(self)
1556 # layouts get put in the middle of the bounding box by
setting the
1557 # scaling to a constant value on a midline
-> 1558 xspread = xmax - xmin
1559 if xspread == 0:
1560 x_scale = 0.0
UnboundLocalError: local variable 'xmin' referenced before assignment
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/18015>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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