latexgraph-theorylyx

How to draw a graph in LaTeX?

First of all, let me say I'm using LyX, though I have no problem using ERT.

Secondly, what is the most simplest way to draw a simple graph like this in Latex? alt text

I've seen some documents with graphs and I've seen some examples, but I couldn't figure out how to just draw a simple graph - what packages do I need, etc?

Solution

  • TikZ can do this.

    A quick demo:

    \documentclass{article}

\usepackage{tikz}

\begin{document}

\begin{tikzpicture}
  [scale=.8,auto=left,every node/.style={circle,fill=blue!20}]
  \node (n6) at (1,10) {6};
  \node (n4) at (4,8)  {4};
  \node (n5) at (8,9)  {5};
  \node (n1) at (11,8) {1};
  \node (n2) at (9,6)  {2};
  \node (n3) at (5,5)  {3};

  \foreach \from/\to in {n6/n4,n4/n5,n5/n1,n1/n2,n2/n5,n2/n3,n3/n4}
    \draw (\from) -- (\to);

\end{tikzpicture}

\end{document}

    produces:

    enter image description here

    More examples @ http://www.texample.net/tikz/examples/tag/graphs/

    More information about TikZ: http://sourceforge.net/projects/pgf/ where I guess an installation guide will also be present.