Rmarkdown如何在图标题中添加脚注

Question

我希望在呈现为PDF和HTML的R markdown报告中，在图例标题中包含脚注（该报告基于bookdown/thesisdown/huskydown）。

理想情况下，使用文本引用会更好：

(ref:foo-footnote) Text in the footnote.
Can span multiple lines, but has to start on the line of the text reference.

(ref:foo-caption) My text with a footnote.^[(ref:foo-footnote)]

我尝试的方法

---
title: "Footnote in Caption"
author: "Test"
output: html_document
#output: pdf_document
---

## Figure with caption which includes a footnote
<!-------------------------------------------------------------------->
<!-- Reference the figure "by number" as usual with \@ref(fig:foo) -->
<!-- Reference the figure "by name" by adding an anchor above the figure: -->
<!-- \hypertarget{fig:foo}{} -->
<!-- which can be referenced by: -->
<!-- [my linked text](#fig:foo) -->

(ref:foo-caption) My caption^[Footnote text.].
(ref:foo-scaption) My short caption

```{r foo, echo=FALSE, out.width='100%', fig.align = "center", fig.cap='(ref:foo-caption)', fig.scap='(ref:foo-scaption)'}
knitr::include_graphics(paste0(fig_path,"foo.png"), auto_pdf = TRUE)
# if auto_pdf = TRUE: includes PDF version of figure if available in same folder
```

- mavericks

Answer 1

这里有一个关于从bookdown生成PDF输出的可重现示例，但我还没有想出如何使其适用于HTML。

基本上，你需要在图表标题中包括\\protect\\footnotemark，然后在Rmd文本中（代码块之外）使用\footnotetext{这里是脚注文本。}来添加你的文本。

---
title: "Footnote in caption"
output: 
  bookdown::pdf_document2: default
---

```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
library(bookdown)
```

```{r pressure, echo=FALSE, fig.cap="This is a figure caption with a footnote.\\protect\\footnotemark", out.width="100%"}
plot(pressure)
```

\footnotetext{Here is the footnote text.}

Here is a plot in Figure \@ref(fig:pressure). 

原始的LaTeX解决方案来自于Tex StackExchange (https://tex.stackexchange.com/questions/10181/using-footnote-in-a-figures-caption)，我只是为Rmd进行了适应，需要在标题中使用双斜杠来表示LaTeX命令。

- Nina

---

这对我来说只是部分有效。它使得Rmarkdown文件跳过一个脚注号，并将相应的脚注放在图像上面的页面上。 - missgwolf