pgfplots network drawing sample

network.tex

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{positioning,arrows,calc}
\usepackage{pgfplots}
\begin{document}

%%%
\tikzstyle{node}=[draw=black,circle,inner sep=0,minimum size=10]
\def \nodes {
  1/-5/8.6,
  2/ 5/8.6,
  3/-10/0,
  4/ 0/ 0,
  5/10/0,
  6/-5/-8.6,
  7/5/-8.6%
}
\def \links{
  1/3,
  1/4,
  2/3,
  2/4,
  2/5,
  3/4,
  3/7,
  4/5,
  4/7,
  5/7,
  6/7%
}
\begin{tikzpicture}[scale=0.5]
  \foreach \nodeID/\x/\y in \nodes { 
    \node [node] (node_\nodeID) at (\x,\y)
    {\nodeID}; 
  }
  \foreach \u/\v in \links 
    \draw (node_\u) -- (node_\v);
\end{tikzpicture}


\end{document}