Graphics, Figures & Tables ⇒ Multiple loops in graph with Tikz

[jocom]

Hi,

I'm trying to build a graph with multiple loops attached to one node.
This is what I have come up with till now.

Code: Select all

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{arrows}
\begin{document}

\begin{figure}
\begin{tikzpicture}[->, shorten >=2pt, shorten <=2pt, >=stealth']
    \tikzstyle{every node}=[draw,circle,fill=black,minimum size=4pt,
                            inner sep=0pt]
\foreach \pos/\name in {{(-1,-1)/a}, {(-1,1)/b}, {(1,1)/c}, {(1,-1)/d}} {
 \node (\name) at \pos {};
}

\draw[<->] (a) -- (b);
\draw[<->] (b) -- (c);
\draw[<->] (c) -- (d);
\draw[<->] (d) -- (a);
\draw[<->] (a) -- (c);
\draw[<->] (b) -- (d);

% building loops
\foreach \k in {1} {
 \foreach \pos/\out in {a/below, b/above,
                        c/above, d/below} {
   \path (\pos) edge [loop \out] (\pos);
 }
}
\end{tikzpicture}
\end{figure}

\end{document}

On the last lines I am trying to build multiple loops for each node. But I actually do not know how to do this properly. Do you have any suggestions? I mean, I do not know how to 'use' the \k in the "\path edge [loop]" command.

jocom