问题描述
我了解到，使用fig.scap应该为图形表提供一个简短的标签，但事实并非如此，它使用了长标签.有任何想法吗? Rstudio版本0.98.1091.
I understood that using fig.scap should provide a short label for use with the table of figures, but it doesn't, it uses the long label. Any ideas? Rstudio Version 0.98.1091.
---
output:
pdf_document:
fig_caption: yes
---
\listoffigures
```{r, fig.cap="long caption",fig.scap="short"}
plot(1:4)
```
推荐答案
此选项最初仅适用于.Rnw文档.它不适用于.Rmd文件.但是，您可以通过指定任何块选项out.width，out.height和fig.align来触发R Markdown中的图的LaTeX输出.例如，
This option was originally designed for .Rnw documents only. It does not apply to .Rmd documents. However, you can trigger LaTeX output for plots in R Markdown by specifying any of the chunk options out.width, out.height, and fig.align. For example,
---
graphics: yes
output:
pdf_document:
fig_caption: yes
---
\listoffigures
```{r, fig.cap="long caption", fig.scap="short", fig.align='center'}
plot(1:4)
```
请注意，您需要knitr> = 1.8(当前在CRAN上)和Pandoc> = 1.13.1(请参见下面的注释). YAML元数据graphics: yes确保Pandoc知道文档中的图形输出(这在技术上无法解释).
Note you need knitr >= 1.8 (currently on CRAN) and Pandoc >= 1.13.1 (see comments below). The YAML metadata graphics: yes makes sure Pandoc is aware of graphics output in the document (it is too technical to explain here).
更新:使用 knitr > = v1.26.4时，不需要特殊处理(例如fig.align = 'center')；使用fig.scap将生成正确的LaTeX输出.由于其他人再次提出了相同的问题，因此我刚刚决定在Github上解决此问题，您将需要
Update: With knitr >= v1.26.4, no special treatment (such as fig.align = 'center') is needed; using fig.scap will generate the correct LaTeX output. Since someone else has asked the same question again, I just decided to fix the issue on Github, and you will need
remotes::install_github('yihui/knitr')
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