Q: PSTricks - balanced pstrees

[Denis Girou]

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The following message is a courtesy copy of an article
that has been posted to comp.text.tex as well.

>>>>> "Glen.Newton" == Glen Newton <gnewton at wapiti.cisti.nrc.ca> writes:

    Glen.Newton> I am using PSTricks to make trees, using pstree. However, when i do
    Glen.Newton> the following, i end up with nodes which are at the same level being
    Glen.Newton> offset vertically:

    Glen.Newton> \pstree[labelsep=2pt]{\TR{level 0}}
    Glen.Newton> 	{
    Glen.Newton> 	  \TR{level 1 a} 
    Glen.Newton> 	  \TR{
    Glen.Newton> 		\begin{tabular}{c}
    Glen.Newton> 		  level 1 b \\
    Glen.Newton> 		  more\\
    Glen.Newton> 		  stuff\\
    Glen.Newton> 		  here 
    Glen.Newton> 		\end{tabular}}
    Glen.Newton> 	}

    Glen.Newton> i.e. the vertex between "level 0" and "level 1 b" is shorter and this
    Glen.Newton> causes things to look "funny". I'd like all nodes at the same level
    Glen.Newton> in the tree to be top aligned. If you can tell me how to do this, i
    Glen.Newton> would appreciate it. 

  This is normal, as default vertical positioning of a tabular environment is
"center". You must use the top "[t]" optional parameter in your case (see
for instance Lamport, page 204).

  P.S. Take care also to spurious blanks!

\documentclass{article}

\usepackage{pst-tree}

\pagestyle{empty}

\begin{document}

\pstree[labelsep=2pt]{\TR{level 0}}
	{%
	  \TR{level 1 a}
	  \TR{%
		\begin{tabular}[t]{c}
		  level 1 b\\
		  more\\
		  stuff\\
		  here
		\end{tabular}}
	}
\hfill
% Original one
\pstree[labelsep=2pt]{\TR{level 0}}
	{
	  \TR{level 1 a}
	  \TR{
		\begin{tabular}{c}
		  level 1 b \\
		  more\\
		  stuff\\
		  here
		\end{tabular}}
	}

\end{document}

Denis Girou
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