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%%
%% The LaTeX Graphics Companion, 2ed (first printing May 2007)
%%
%% Example 6-3-19 on page 375.
%%
%% 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{207.83385pt}
\StartShownPreambleCommands
\usepackage{pstricks,pst-tree} \SpecialCoor
\StopShownPreambleCommands
\begin{document}
\psset{nodesep=5pt}
\pstree[treemode=R,levelsep=3cm]{%
\rnode{A}{}\Tr{\rnode{A}{}Friedrich Wilhelm}}{%
\pstree{\Tr{Friedrich I.}}{%
\Tr{\rnode{C}{}Friedrich Wilhelm I.} \Tr{Friedrich}}
\pstree{\Tr{\rnode{B}{}Albrecht Friedrich}}{%
\Tr{Wilhelm Heinrich} \Tr{Friedrich}}}
\psset{arrowscale=2,linewidth=0.2pt}
\pcline[linestyle=dashed](A)(A|0,-1) \pcline[linestyle=dashed](B)(B|0,-1)
\pcline[linestyle=dashed](C)(C|0,-1)
\pnode(A|0,-.8){A1}\pnode(B|0,-.8){A2} \ncline[arrows=<->]{A1}{A2}
\ncput*{\texttt{levelsep}}
\pnode(C|0,-.8){A3} \ncline[arrows=<->]{A2}{A3}\ncput*{\texttt{levelsep}}
\end{document}
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