Tikz：对齐节点下方多个标签的基线

Question

我需要一些有关 tikz 的帮助。我有多个带标签的节点，我的问题是节点下方的标签放置方式使其上边界对齐。我该如何更改它以使标签在其基线对齐？这是一个最小示例，节点上方的标签看起来不错，但下面的标签很糟糕。

\begin{tikzpicture}
\node[circle,fill,label=above:$n$] at (0,1) {};
\node[circle,fill,label=below:$n$] at (0,0) {};
\node[circle,fill,label=above:$n-1$] at (1,1) {};
\node[circle,fill,label=below:$n-1$] at (1,0) {};
\node[circle,fill,label=above:$c$] at (2,1) {};
\node[circle,fill,label=below:$c$] at (2,0) {};
\node[circle,fill,label=above:$d$] at (3,1) {};
\node[circle,fill,label=below:$d$] at (3,0) {};
\end{tikzpicture}

Answer 1

快速破解使所有标签具有相同的高度：

\documentclass{standalone}
\usepackage{tikz}

\begin{document}
    
\begin{tikzpicture}
\node[circle,fill,label=above:\strut$n$] at (0,1) {};
\node[circle,fill,label=below:\strut$n$] at (0,0) {};
\node[circle,fill,label=above:\strut$n-1$] at (1,1) {};
\node[circle,fill,label=below:\strut$n-1$] at (1,0) {};
\node[circle,fill,label=above:\strut$c$] at (2,1) {};
\node[circle,fill,label=below:\strut$c$] at (2,0) {};
\node[circle,fill,label=above:\strut$d$] at (3,1) {};
\node[circle,fill,label=below:\strut$d$] at (3,0) {};
\end{tikzpicture}

\end{document}

Answer 2

本质上与@samcarter_is_at_topanswers.xyz (+1) 的解决方案相同，但为了方便起见，您可以创建一种\strut在每个标签中添加的样式。

\documentclass{article}

\usepackage{tikz}
\tikzset{mynode/.style={circle, fill, label=#1\strut}}

\begin{document}
\begin{tikzpicture}
\node[mynode=above:$n$] at (0,1) {};
\node[mynode=below:$n$] at (0,0) {};
\node[mynode=above:$n-1$] at (1,1) {};
\node[mynode=below:$n-1$] at (1,0) {};
\node[mynode=above:$c$] at (2,1) {};
\node[mynode=below:$c$] at (2,0) {};
\node[mynode=above:$d$] at (3,1) {};
\node[mynode=below:$d$] at (3,0) {};
\end{tikzpicture}
\end{document}

Answer 3

这是@samcarter_is_at_topanswers.xyz 的答案，没有使用节点标签。来自此链接

\strut——用于创建一个没有宽度、高度 8.6pt、深度 3pt 的隐形框。

\documentclass[tikz]{standalone}
\begin{document}
\begin{tikzpicture}[c/.style={circle,fill=brown,inner sep=1.5pt}]
\path
(0,1) node[c]{} node[above]{\strut$n$} 
(1,1) node[c]{} node[above]{\strut$n-1$}
(2,1) node[c]{} node[above]{\strut$c$}
(3,1) node[c]{} node[above]{\strut$g$}
;
\path
(0,0) node[c]{} node[below]{\strut$n$} 
(1,0) node[c]{} node[below]{\strut$n-1$}
(2,0) node[c]{} node[below]{\strut$h$}
(3,0) node[c]{} node[below]{\strut$y$}
;
\end{tikzpicture}
\end{document}