默认主题中的 R beamer 编号

R beamer numbering in default theme

我正在寻找一种解决方案,了解如何在主题设置为“默认”的 R beamer_presentation 中强制幻灯片编号。

到目前为止,我已经找到了解决方案,但在“大都市”之下。如果我只键入“default”而不是“metropolis”,则会出现错误。

---
title: "**TITLE**"
subtitle: "Subtitle"
author: "Name"
institute: ""
date: January 25, 2022
output:
  beamer_presentation:
  theme: "default"
  keep_md: true
  keep_tex: no
  latex_engine: xelatex
  includes:
     in_header:
  incremental: no
classoption: aspectratio=169
header-includes:
    - \usetheme[numbering=fraction]{metropolis}
    - \def\ps@navigation@titlepage{\setbeamertemplate{footline}{}\@nameuse{ps@navigation}}
---

Beamer 实际上有一个非常方便的宏来添加帧号:\setbeamertemplate{footline}[frame numbers] 到 footline

---
title: "**TITLE**"
subtitle: "Subtitle"
author: "Name"
institute: ""
date: January 25, 2022
output:
  beamer_presentation:
    keep_tex: true
header-includes:
  - \setbeamertemplate{footline}[frame number]
---

ttt

(需要 rmarkdown v2.11.15 或更新版本)