以下代码生成了漂亮的树pst-trees。我必须给树的叶子添加光泽，所以我将表格环境放入其中并添加了光泽。问题是代码没有将节点对齐到顶部，而是将它们居中。这意味着 David 上方的 N 位于is和之间AUX。但它应该像左边的例子一样位于的高度is。这可能吗？
\documentclass{article}
\usepackage{pst-tree}
\psset{nodesep=5pt}
\psset{linewidth=0.5pt}
\makeatletter
\def\tree{\@ifnextchar[{\@tree}{\@tree[top]}}
\def\@tree[#1]#2#3{%
\renewcommand\psedge{\ncdiag[arm=0,angleA=270,angleB=90,linewidth=.5pt]}
\pstree[levelsep=*2.8ex,nodesep=3pt,treesep=.5cm]{\TR[name=#1]{\small #2}}{#3}}
\def\le{\@ifnextchar[{\@le}{\@le[lex]}}
\def\@le[#1]#2{\renewcommand\psedge{\ncdiag[arm=0,angleA=270,angleB=90,linewidth=.5pt]}
\TR[name={#1}]{\begin{tabular}{@{}c@{}}#2\end{tabular}}}
\makeatother
\begin{document}
\tree[a]{IP}{%
\tree{NP}{\tree{N$'$}{%
\tree{N}{\le{David}}}}
\tree[b]{I$'$}{%
\tree[c]{I}{\le{is}}
\tree[d]{VP}{\tree[e]{V$'$}{\tree[f]{V}{\le{yawning}}}}}}%
\hfill
\tree[a]{IP}{%
\tree{NP}{\tree{N$'$}{%
\tree{N}{\le{David\\David}}}}
\tree[b]{I$'$}{%
\tree[c]{I}{\le{is\\\textsc{aux}}}
\tree[d]{VP}{\tree[e]{V$'$}{\tree[f]{V}{\le{yawning\\gloss}}}}}}%
\end{document}
答案1
只需将选项[t]$添加到tabular_环境中：
\documentclass{article}
\usepackage{pst-tree}
\psset{nodesep=5pt}
\psset{linewidth=0.5pt}
\makeatletter
\def\tree{\@ifnextchar[{\@tree}{\@tree[top]}}
\def\@tree[#1]#2#3{%
\renewcommand\psedge{\ncdiag[arm=0,angleA=270,angleB=90,linewidth=.5pt]}
\pstree[levelsep=*2.8ex,nodesep=3pt,treesep=.5cm]{\TR[name=#1]{\small #2}}{#3}}
\def\le{\@ifnextchar[{\@le}{\@le[lex]}}
\def\@le[#1]#2{\renewcommand\psedge{\ncdiag[arm=0,angleA=270,angleB=90,linewidth=.5pt]}
\TR[name={#1}]{\begin{tabular}{@{}c@{}}#2\end{tabular}}}
\makeatother
\begin{document}
\tree[a]{IP}{%
\tree{NP}{\tree{N$'$}{%
\tree{N}{\le{David}}}}
\tree[b]{I$'$}{%
\tree[c]{I}{\le{is}}
\tree[d]{VP}{\tree[e]{V$'$}{\tree[f]{V}{\le{yawning}}}}}}%
\hfill
\tree[a]{IP}{%
\tree{NP}{\tree{N$'$}{%
\tree{N}{\le{David\\David}}}}
\tree[b]{I$'$}{%
\tree[c]{I}{\le{is\\\textsc{aux}}}
\tree[d]{VP}{\tree[e]{V$'$}{\tree[f]{V}{\le{yawning\\gloss}}}}}}%
\end{document}
