如果我想在节点 1-1 和 2-2 之间画一条线：
\begin{tikzpicture}
\matrix (magic) [matrix of math nodes, left delimiter=\lvert, right delimiter=\rvert,column sep=4pt,row sep=4pt]
{
\draw (0,0) circle (5pt); & \fill (0,0) circle (2pt); & \fill (0,0) circle (2pt);\\
\fill (0,0) circle (2pt); & \draw (0,0) circle (5pt); & \fill (0,0) circle (2pt);\\
\fill (0,0) circle (2pt); & \fill (0,0) circle (2pt); & \draw (0,0) circle (5pt);\\
};
%\draw[thick,red,->] (magic-1-1) |- (magic-2-2);
\结束{tikzpicture}
我得到：
generic/fonts/otf/lmroman12-bold.luc)(load luc: /home/xan/.texlive/texmf-var/lua
tex-cache/generic/fonts/otf/lmroman12-bold.luc) [13] [14]
Capítol 1.
(compiling luc: /var/lib/texmf/luatex-cache/generic/fonts/otf/lmroman12-italic.l
uc)(load luc: /home/xan/.texlive/texmf-var/luatex-cache/generic/fonts/otf/lmroma
n12-italic.luc)(compiling luc: /var/lib/texmf/luatex-cache/generic/fonts/otf/lmr
oman10-bolditalic.luc)(load luc: /home/xan/.texlive/texmf-var/luatex-cache/gener
ic/fonts/otf/lmroman10-bolditalic.luc) [15](compiling luc: /var/lib/texmf/luatex
-cache/generic/fonts/otf/lmsans10-bold.luc)(load luc: /home/xan/.texlive/texmf-v
ar/luatex-cache/generic/fonts/otf/lmsans10-bold.luc)
! Package pgf Error: No shape named magic-1-1 is known.
See the pgf package documentation for explanation.
Type H <return> for immediate help.
...
l.100 \draw[thick,red,->] (magic-1-1)
|- (magic-2-2);
?
为什么？
如果我抑制 \draw line，一切都正常。
答案1
错误原因是tikz 图表的编译问题。这是使用节点样式来绘制点和圆圈的另一种方法。
\documentclass{article}
\usepackage{tikz,amsmath}
\usetikzlibrary{matrix}
\begin{document}
\begin{tikzpicture}[
dot/.style={inner sep=0pt,minimum size=2pt,fill=black,circle},
ring/.style={inner sep=0pt,minimum size=5pt,draw,circle}]
\matrix (magic) [matrix of math nodes,
left delimiter=\lvert,
right delimiter=\rvert,
column sep=4pt,row sep=4pt]
{
|[ring]| & |[dot]| & |[dot]| \\
|[dot]| & |[ring]| & |[dot]| \\
|[dot]| & |[dot]| & |[ring]| \\
};
\draw[thick,red,->] (magic-1-1) |- (magic-2-2);
\end{tikzpicture}
\end{document}