tikZ | Indicate further Vertices

[RichardLang]

Hi,

I use tikZ to draw graphs. In the picture below, I'd like to indicate that the vertices v_1, v_2 and v have neighbours that are not shown in the picture. I was thinking about a little cone or something similar, but I've no idea how to implement that.

Code: Select all  •  Open in writeLaTeX

\documentclass[11pt,a4paper]{article}
\usepackage[T1]{fontenc}
\usepackage{tikz}

\begin{document}
  \begin{figure}[!ht]
    \centering
    \tikzstyle{vertex}=[circle,draw, minimum size=12pt,inner sep=0pt]
    \tikzstyle{edge}=[draw,-]
    \tikzstyle{weight}=[font=\small]
    \begin{tikzpicture}
      \foreach \pos/\name in {{(1,3)/v_1}, {(1,2)/v}, {(2,2)/w_2},{(0,2)/w_1},{(1,1)/v_2}, {(2,3)/v_3}}
        \node[vertex] (\name) at \pos {$\name$};
      \foreach \source/ \dest /\weight in {v_1/v/5, v_1/w_1/3,v_1/w_2/3,v/w_1/2, v/w_2/2, v_2/v/5 , v_2/w_1/3 , v_2/w_2/3, v/v_3/1 }
        \path[edge] (\source) -- node[weight] {} (\dest);
      \foreach \vertex in {}
        \path node[selected vertex] at (\vertex) {$\vertex$};
    \end{tikzpicture}
  \end{figure}
\end{document}

It would be great if someone could help me out here or just post an example.


Thanks in advance
Richard

[percusse]

Where would you put those cones with respect to the nodes? You can also consider drawing dashed lines (a web-like structure) in the background to indicate that there is more to the graph than it is already being shown.

[RichardLang]

Thanks for the answer! I would like to produce something like in the picture of page 2 of this article:

http://www.nishizeki.ecei.tohoku.ac.jp/ ... J/J147.pdf