Why does \@ref() notation fail to operate with beamer-presentation?
The following question may remind you some questions on cross-reference when knitting PDF document, e.g. this, but the methods introduced in the answers have not help me when I make beamer-presentations.
Now I'm confused because \@ref(fig:label-to-refer-figure) and \@ref(tab:label-to-refer-table) notation to refer a figure/table does not work when I am knitting an .Rmd file with the option output: beamer_presentation. As shown in the following images, the raw codes for the cross-reference appear on the outputted PDF file and I cannot refer the figure/table number. Although the citations go well even in the listed environment as well as in plain text field, cross-reference for figure/table number does not properly take effect.
My environment
- R version 3.5.1 (2018-07-02)
- Platform: x86_64-w64-mingw32/x64 (64-bit)
- Running under: Windows 10 x64 (build 17134)
- knitr_1.20
- rmarkdown_1.10
- RStudio v1.2.1206 (Preview Version) <- I prefer this for this reason
MWEs
The MWE I post here is created from the following sources: test-beamer.Rmd and myref.bib.
test-beamer.Rmd
---
title: "Test"
subtitle: |
| subtitle,
| with a line break
author: |
| CLR
| Rafael
institute: |
| Now I'm here,
| Now I'm there
date: "`r format(Sys.time(), '%Y/%b/%d')`" #English
output:
beamer_presentation:
keep_tex: yes
latex_engine: lualatex
theme: "AnnArbor"
colortheme: "dolphin"
fonttheme: "structurebold"
toc: true
#toc_depth: 3
#number_sections: TRUE
fig_caption: TRUE
dev: cairo_pdf
#extra_dependencies: subfig
citation_package: natbib
slide_level: 2
bibliography: bibs/myref.bib
biblio-style: apa
always_allow_html: yes
---
```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = FALSE)
```
## The only thing
With Table \@ref(tab:under-pressure-table), @test-master shows that Figure \@ref(fig:under-pressure) depicts...
## Slide with Bullets in which I want to refer a figure
- \@ref(fig:under-pressure)
- @test-master
- \@ref(tab:under-pressure-table)
## Slide with R Output
```{r cars, echo = TRUE}
summary(cars)
```
## Slide with Plot
```{r under-pressure, fig.cap='Under Pressure', fig.pos='h', out.width="0.75\\textwidth"}
plot(pressure)
```
## Slide with Table
```{r under-pressure-table, caption = "This is a table"}
knitr::kable(pressure)
```
## More extraordinary
With Table \@ref(tab:under-pressure-table), @test-master shows that Figure \@ref(fig:under-pressure) depicts...
EDIT: I added fig.cap='Under Pressure', fig.pos='h', out.width="0.75\\textwidth" to the figure chunk, and caption = "This is a table" to the knitr::kable(). Without these codes, neither the caption nor table/figure numbers appear at all... However, the problem persists even after giving them to the entire .Rmd file, unless you carry out @Yihui's answer.
myref.bib
@master{test-master,
author = {Freddie Mercury and Brian May and John Deacon and Roger Taylor},
title = {Bohemian {R}hapsody: {W}e are the champions},
school = {{Queen}},
year = {2018},
address = {London}
}
