Rmarkdown 演示文稿幻灯片代码

Question

我正在使用 rmarkdown 在 RStudio 中进行投影仪演示。我想在演示文稿的顶部获得幻灯片代码。德累斯顿主题应该支持那些代码Dresden

那么是否可以通过使用 rmarkdown 来获取这些代码？当我编织 pdf 时，我得到的演示文稿没有幻灯片代码。

示例代码：

---
title: "Example"
output: beamer_presentation
theme: Dresden
---

# R Markdown

This is an R Markdown presentation. Markdown is a simple formatting syntax for authoring HTML, PDF, and MS Word documents. For more details on using R Markdown see <http://rmarkdown.rstudio.com>.

When you click the **Knit** button a document will be generated that includes both content as well as the output of any embedded R code chunks within the document.

# Slide with Bullets

- Bullet 1
- Bullet 2
- Bullet 3

# Slide with R Code and Output

```{r}
summary(cars)
```

# Slide with Plot

```{r, echo=FALSE}
plot(cars)
```

Answer 1

我认为slide_level 选项可能是您正在寻找的：

slide_level 选项定义了定义单个幻灯片的标题级别。默认情况下，这是层次结构中的最高标题级别，紧随其后的是内容，而不是文档中某处的另一个标题。可以通过指定显式 slide_level 来覆盖此默认值 documentation source

例如slide_level: 2:

---
title: "Example"
output: 
  beamer_presentation:
    slide_level: 2
theme: Dresden
---

为您提供以下输出

但是您需要为幻灯片标题提供较低级别的标题，例如

# R Markdown

## Description
This is an R Markdown presentation. Markdown is a simple formatting 
syntax for authoring HTML, PDF, and MS Word documents. For more 
details on using R Markdown see <http://rmarkdown.rstudio.com>.

When you click the **Knit** button a document will be generated that 
includes both content as well as the output of any embedded R code 
chunks within the document.

编辑要获得与您附加的图像相同的输出，您可以按以下方式对演示文稿进行分区：

---
title: "Example"
output: 
  beamer_presentation:
    slide_level: 3
theme: Dresden
---
# Section 1
## Subsection 1
### Title A
### Title B
## Subsection 2
### Title A
## Subsection 3
### Title A
### Title B
### Title C
# Section 2
## Subsection 1
### Title A
### Title B

并生成以下演示标题：