Beamer演示文稿RStudio更改块的字体大小

I am using Knit PDF to compile a beamer presentation in RStudio.

我正在使用Knit PDF在RStudio中编译beamer演示文稿。

---
title: "A.P. Statistics"
author: "Notes for Chapter 3.Rmd"
date: "Monday, October 13, 2014"
output: beamer_presentation
---

## Computer Output

```{r}
summary(lm(cars$dist~cars$speed))
```

How can I change the font size (just for this one chunk, leaving other chunks the same font size) so that the output of this command fits on one slide?

如何更改字体大小（仅适用于此一个块，其他块保持相同的字体大小），以便此命令的输出适合一张幻灯片？

2 个解决方案

#1

One solution is using knitr hooks. A hook is code that will run before or after the chunk code is executed. You could use it to insert a LaTeX fontsize command in the file.

一种解决方案是使用针织钩。钩子是在块代码执行之前或之后运行的代码。您可以使用它在文件中插入LaTeX fontsize命令。

```{r echo=FALSE}
knitr::knit_hooks$set(mysize = function(before, options, envir) {
  if (before) 
    return(options$size)
})
```

Know you can change the size by

知道你可以改变大小

```{r mysize=TRUE, size='\\large'}
1:10
```

One Drawback is that this type of hook will affect all the fonts on a slide, i.e. also the echoed R-Code. Though cumbersome, you could use two consecutive chunks (1st: echo, results no; 2nd: no echo, results yes) to evade this.

一个缺点是这种类型的挂钩会影响幻灯片上的所有字体，即回显的R-Code。虽然很麻烦，但你可以使用两个连续的块（第一个：echo，结果没有;第二个：没有回声，结果是）来逃避这个。

```{r results="'hide'}
1:10
```

```{r echo=FALSE, mysize=TRUE, size='\\large'}
1:10
```

PS. Maybe there is a better way by modifying output hooks instead of chunk hooks.

PS。也许通过修改输出挂钩而不是块挂钩有更好的方法。

#2

Here's how i do it ...

这是我怎么做的......

add the following to your slideStyle.sty file

将以下内容添加到slideStyle.sty文件中

% set font size to 7 with line breaks at 8
\newcommand\FontSmall{\fontsize{7}{8}\selectfont}

call the file at the top of your markdown:

调用降价顶部的文件：

output: 
  beamer_presentation:
    includes: 
      in_header: "P:/R/Slides/slideStyles.sty"

and then in your .Rmd file add the below

然后在你的.Rmd文件中添加以下内容

## Tiny font slide

\FontSmall

here is some tiny font ...

#1