%% 
%%  The LaTeX Graphics Companion, 2ed (first printing May 2007)
%% 
%%  Example 6-2-18 on page 343.
%% 
%%  Copyright (C) 2007 Michel Goossens, Frank Mittelbach, Denis Roegel, Sebastian Rahtz, Herbert Vo\ss 
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 

\documentclass{ttctexa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{135.83385pt}
\StartShownPreambleCommands
\usepackage{pstricks,pst-node}
\StopShownPreambleCommands
\begin{document}
\begin{pspicture}(-0.2,-1)(3,1)
  \cnode{12pt}{a}
  \rput[l](3,1){\rnode{b}{H}} \rput[l](3,-1){\rnode{c}{T}}
  \ncdiagg[angleA=180,armA=1.5,nodesepA=3pt]{b}{a}
  \nbput[nrot=:D,npos=1.3]{\texttt{\textbackslash ncdiagg}}
  \ncdiag[angleA=180,armA=1.5,armB=0,nodesepA=3pt]{c}{a}
  \naput[nrot=:D,npos=1.3]{\texttt{\textbackslash ncdiag}}
\end{pspicture}
\end{document}