我在森林中种植了树木，树中的每个节点都用上标（索引）和下标（外标）标注，我将其实例化为单独的节点，并放置在每个树节点的左角和右角。然而，我遇到了一些困扰我一段时间的问题。
1) 目前，这些标签相对于节点中心固定，但我想考虑每个节点标签的宽度。如果您看到我的示例，则对于带有较短（1 个字母）标签的节点，输出是可以的，但对于较长的标签，输出会变得更丑。例如忘记，我希望它们位于单词的边缘，而不是节点中心。我想修改 index 和 outdex 的定义，但我不知道如何引用节点标签的宽度。
当然，我可以手动更改这棵树的放置位置，但我需要将它们作为 Python 脚本的输出生成，所以我试图想出一个固定的解决方案。我想到的一个替代方案是生成这些注释而不是^\Index\Label_\Outdex单独的节点，但这样我就无法在 outindex 周围放置框。
2) 其他事情应该非常简单，但不知何故我还是搞不懂。我想更改一些节点周围的框，使它们小一点，不与主节点标签重叠。我尝试更改宽度和内部分隔符（例如\tikzset{boxed/.style = {draw, minimum size=0em, inner sep=.05em}}），但没有任何变化，所以我猜我误解了这些命令。我尝试重新阅读手册，但唉，我被卡住了。
希望问题已经清楚！任何帮助都欢迎！
\documentclass{article}
% load tikz and forest with more visible arrows
\usepackage{tikz}
\usepackage{forest}
\usetikzlibrary{arrows.meta}
% define annotations <- THESE ARE THE THINGS I AM TRYING TO FIX
\tikzset{annotation/.style = {font=\footnotesize}}
\tikzset{index/.style = {annotation, anchor= south east}}
\tikzset{outdex/.style = {annotation, anchor= north west}}
\tikzset{boxed/.style = {draw}}
\tikzset{empty/.style = {}}
\tikzset{non-final/.style = {opacity=70}}
\begin{document}
\begin{forest}
%
%%%%%%%%
% Tree %
%%%%%%%%
%
[$v$P, name=t1222121
[DP, name=subj
[the, name=t122212111]
[lawyer, name=t122212112]
]
[$v$', name=t12221212
[$v2$, name=t122212121]
[VP, name=t122212122
[forgets, name=t1222121221]
[DP, name=t1222121222
[his, name=t12221212221]
[briefcase, name=t12221212222]
]
]
]
]
%%%%%%%%%%%%%%%
% Annotations %
%%%%%%%%%%%%%%%
%
\node[index] at (t1222121) {18};
\node[outdex] at (t1222121) {19};
%
\node[index] at (subj) {19};
\node[outdex] at (subj) {20};
%
\node[index] at (t122212111) {20};
\node[outdex] at (t122212111) {21};
%
\node[index] at (t122212112) {20};
\node[outdex] at (t122212112) {22};
%
\node[index] at (t12221212) {19};
\node[outdex, boxed] at (t12221212) {24};
%
\node[index] at (t122212121) {24};
\node[outdex] at (t122212121) {25};
%
\node[index] at (t122212122) {24};
\node[outdex] at (t122212122) {26};
%
\node[index] at (t1222121221) {26};
\node[outdex] at (t1222121221) {27};
%
\node[index] at (t1222121222) {26};
\node[outdex] at (t1222121222) {28};
%
\node[index] at (t12221212221) {28};
\node[outdex] at (t12221212221) {29};
%
\node[index] at (t12221212222) {28};
\node[outdex] at (t12221212222) {30};
\end{forest}
\end{document}
答案1
如果你改变节点的定位锚点，稍微调整一下inner sep和outer sep，并增加级别之间的距离，那么树就不会那么拥挤。
\documentclass{article}
% load tikz and forest with more visible arrows
\usepackage{forest}
\usetikzlibrary{arrows.meta}
% define annotations <- THESE ARE THE THINGS I AM TRYING TO FIX
\tikzset{annotation/.style = {font=\footnotesize,inner sep=0.5pt,outer sep=-2pt}}
\tikzset{index/.style = {annotation, anchor= south}}
\tikzset{outdex/.style = {annotation, anchor= north}}
\tikzset{boxed/.style = {draw}}
\tikzset{empty/.style = {}}
\tikzset{non-final/.style = {opacity=70}}
\begin{document}
\begin{forest}
%
%%%%%%%%
% Tree %
%%%%%%%%
%
for tree={where level=0{l sep+=2.5em}{l sep+=0.5em}},
[$v$P, name=t1222121
[DP, name=subj
[the, name=t122212111]
[lawyer, name=t122212112]
]
[$v$', name=t12221212
[$v2$, name=t122212121]
[VP, name=t122212122
[forgets, name=t1222121221]
[DP, name=t1222121222
[his, name=t12221212221]
[briefcase, name=t12221212222]
]
]
]
]
%%%%%%%%%%%%%%%
% Annotations %
%%%%%%%%%%%%%%%
%
\node[index] at (t1222121.north west) {18};
\node[outdex] at (t1222121.south east) {19};
%
\node[index] at (subj.north west) {19};
\node[outdex] at (subj.south east) {20};
%
\node[index] at (t122212111.north west) {20};
\node[outdex] at (t122212111.south east) {21};
%
\node[index] at (t122212112.north west) {20};
\node[outdex] at (t122212112.south east) {22};
%
\node[index] at (t12221212.north west) {19};
\node[outdex, boxed] at (t12221212.south east) {24};
%
\node[index] at (t122212121.north west) {24};
\node[outdex] at (t122212121.south east) {25};
%
\node[index] at (t122212122.north west) {24};
\node[outdex] at (t122212122.south east) {26};
%
\node[index] at (t1222121221.north west) {26};
\node[outdex] at (t1222121221.south east) {27};
%
\node[index] at (t1222121222.north west) {26};
\node[outdex] at (t1222121222.south east) {28};
%
\node[index] at (t12221212221.north west) {28};
\node[outdex] at (t12221212221.south east) {29};
%
\node[index] at (t12221212222.north west) {28};
\node[outdex] at (t12221212222.south east) {30};
\end{forest}
\end{document}
