答案1
你可以使用这个forest
包。这个想法来自这里。
\documentclass[border=5pt]{standalone}
\usepackage{forest}
\begin{document}
\begin{forest}
for tree={
% nodes
minimum width = 8em,
delay = {where content={}{shape=coordinate}{},
% tree
calign=fixed edge angles,
calign angle=40, %angle between two nodes
grow=north, %direction of forest grow
},
}
% tree body
[
[
[
[,tier=L]
%[
%[]
[,tier=L]
%]
]
[,phantom,fit=band]
[
[,tier=L]
%[
[,tier=L]
%[]
%]
]
]
]
\end{forest}
\end{document}