在Quarto中添加带交叉引用的Tikz图片问题求助

你的问题核心是Tikz代码块未设置对应的交叉引用标签，Quarto实现图的交叉引用需要给代码块添加特定格式的label属性，且引用标识要与标签匹配。

以下是修改后可正常实现交叉引用的完整代码：

---
title: "Testing"
format: pdf
editor: visual
---

See @fig-my-figure for example.

```{r, engine = 'tikz'}
#| echo: false
#| fig.align: center
#| label: fig-my-figure  # 新增标签，与引用标识@fig-my-figure对应
#| fig.cap: "自定义图表标题"  # 可选：添加标题后PDF会自动生成带编号的图注

\usetikzlibrary{arrows}
\usetikzlibrary{positioning}
\usetikzlibrary{calc}
\usetikzlibrary{arrows.meta}
\usetikzlibrary{decorations.pathreplacing}

\begin{tikzpicture}
\draw (0,0)node(a){} -- (10,0) node (b) {} ;
\foreach \x in  {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10} % edit here for the vertical lines
\draw[shift={(\x,0)},color=black] (0pt,3pt) -- (0pt,-3pt);
\foreach \x in {0, 0.2, 0.4, 0.6, 0.8, 1} % edit here for the numbers
\draw[shift={(\x*10,0)},color=black] (0pt,0pt) -- (0pt,-3pt) node[below]
{$\x$};
\node at (8, 0.5) (eq1) {$\textcolor{red}{\boldsymbol{SQ}}$};
\node at (4, 0.5) (eq2) {$\textcolor{purple}{\boldsymbol{G_i(0)}}$}; 
\node at (7, 0.5) (eq2) {$\textcolor{purple}{\boldsymbol{G_i(1)}}$}; 
\node at (3, 0.5) (eq3) {$\textcolor{blue}{\boldsymbol{P}}$};
\node at (0, 0.5) (eq4) {$\textcolor{black}{\boldsymbol{x_i}}$};
\draw[decorate, decoration={brace, amplitude=6pt, mirror},] ([yshift=0.5cm]4,0.5)-- node[above=0.25cm]
{\shortstack{Text}}([yshift=0.5cm]3,0.5);
\draw[decorate, decoration={brace, amplitude=6pt},] ([yshift=-1cm]7,0)-- node[below=0.25cm]
{\shortstack{Text}}([yshift=-1cm]3,0);
\end{tikzpicture}

关键修改说明： #

• 必须在Tikz代码块的YAML选项中添加#| label: fig-my-figure，标签名需以fig-开头，且和引用时的@fig-my-figure完全一致，Quarto才会识别为图表引用标签。
• 可选添加#| fig.cap属性设置图标题，编译PDF时会自动生成带编号的图注，交叉引用会关联这个编号。

重新编译为PDF后，交叉引用即可正常生效。

内容的提问来源于stack exchange，提问作者Ryan Baxter-King