In version 5.3 of Sage, if the vertices of a graph are matrices, then the default latex output does not compile. The default format is a tikzpicture and uses the tkz-berge library. One solution is to change the format to dot2tex. See below.
The default tikz output is:
sage:m=matrix(3,range(9))sage:m.set_immutable()sage:G=Graph()sage:G.add_vertex(m)sage:latex(G) \begin{tikzpicture}% \useasboundingbox(0,0)rectangle(5.0cm,5.0cm);% \definecolor{cv0}{rgb}{0.0,0.0,0.0} \definecolor{cfv0}{rgb}{1.0,1.0,1.0} \definecolor{clv0}{rgb}{0.0,0.0,0.0}% \Vertex[style={minimumsize=1.0cm,draw=cv0,fill=cfv0,text=clv0,shape=circle},LabelOut=false,L=\hbox{$\left(\begin{array}{rrr}0&1&2 \\ 3&4&5 \\ 6&7&8 \end{array}\right)$},x=2.5cm,y=2.5cm]{v0}%% \end{tikzpicture}
This output does not compile. Here is the error I get:
sage: view(G)
An error occurred.
This is pdfTeX, Version 3.1415926-1.40.10 (TeX Live 2009) (format=pdflatex 2011.4.19) 18 OCT
2012 21:34
entering extended mode
[...]
! Use of \tikz@@scope@env doesn't match its definition.
\pgfutil@ifnextchar #1#2#3->\let \pgfutil@reserved@d =#1\def \pgfutil@reserved@a {
#2}\def \pgf
util@reserved@b {#3}\futurelet \pgfutil@let@token \pgfutil@ifnch
l.54 \end{array}\right)$},x=2.5cm,y=2.5cm]{v0}
If you say, e.g., `\def\a1{...}', then you must always
put `1' after `\a', since control sequence names are
made up of letters only. The macro here has not been
followed by the required stuff, so I'm ignoring it.
! Use of \tikz@@scope@env doesn't match its definition.
[...]
! ==> Fatal error occurred, no output PDF file produced!
Latex error
The command to install dot2tex:
sage -i dot2tex-2.8.7-2
As the documentation of G.layout_graphviz() says, install graphviz>= 2.14 so that the programs dot, neato, ... are in your path. This allows the following to work:
sage:m=matrix(3,range(9))sage:m.set_immutable()sage:G=Graph()sage:G.add_vertex(m)sage:G.set_latex_options(format='dot2tex')sage:view(G)
To obtain the tikz code:
sage:tikz_string=G.latex_options().dot2tex_picture()sage:printtikz_string \begin{tikzpicture}[>=latex,linejoin=bevel,]%% \node(012345678)at(34bp,22bp)[draw,draw=none]{$\left(\begin{array}{rrr}0&1&2 \\3&4&5 \\6&7&8\end{array}\right)$};% \end{tikzpicture}