[OS X TeX] Complete Graphs on n vertices

[Luís Fernando Sequeira]

As promised, here is a version of the code to draw a complete graph, using tikz. 
In this complete example, it draws K28, but it works with any number of nodes.
I added an optional parameter so you can easily change the size of the drawing.

I find it quite nice, too :-)

Regards

Luís Sequeira

----------
%!TEX TS-program = xelatex

\documentclass{article}

\pagestyle{empty}

\usepackage{tikz}

\newcommand{\K}[2][5]{
    \begin{tikzpicture}
      \newcommand{\ang}{360/#2}
      \foreach \i in {1,...,#2}
         \foreach \j in {1,...,#2}
            \draw (\ang*\i:#1) -- (\ang*\j:#1);
   \end{tikzpicture}
}

\begin{document}
\begin{center}
\K[3]{23}
\end{center}
\end{document}
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