沙林甘幻灯片上的水平可滚动输出

Question

我希望将R命令的输出显示在水平滚动框中。参考：

library(ggplot2movies)
head(movies)
#                      title year length budget rating votes   r1   r2  r3   r4   r5   r6   r7   r8   r9  r10 mpaa Action Animation Comedy Drama Documentary Romance Short
# 1                        $ 1971    121     NA    6.4   348  4.5  4.5 4.5  4.5 14.5 24.5 24.5 14.5  4.5  4.5           0         0      1     1           0       0     0
# 2        $1000 a Touchdown 1939     71     NA    6.0    20  0.0 14.5 4.5 24.5 14.5 14.5 14.5  4.5  4.5 14.5           0         0      1     0           0       0     0
# 3   $21 a Day Once a Month 1941      7     NA    8.2     5  0.0  0.0 0.0  0.0  0.0 24.5  0.0 44.5 24.5 24.5           0         1      0     0           0       0     1
# 4                  $40,000 1996     70     NA    8.2     6 14.5  0.0 0.0  0.0  0.0  0.0  0.0  0.0 34.5 45.5           0         0      1     0           0       0     0
# 5 $50,000 Climax Show, The 1975     71     NA    3.4    17 24.5  4.5 0.0 14.5 14.5  4.5  0.0  0.0  0.0 24.5           0         0      0     0           0       0     0
# 6                    $pent 2000     91     NA    4.3    45  4.5  4.5 4.5 14.5 14.5 14.5  4.5  4.5 14.5 14.5           0         0      0     1           0       0     0

如何使输出在xaringan幻灯片上水平滚动？

Answer 1

@Yihui Xie几乎在Github上提供了答案。我只是把它变成一个工作的例子。需要注意的是：

1(可以在Rmarkdown中将css指定为代码块，或者可以按照以下准则编写自己的css文件：https://github.com/yihui/xaringan/wiki。我假设这是一次性的事情，所以为了简单起见，我将 css 包含在 Rmd 文件中。

2(为pre元素设置属性后，还需要将width选项或R设置为较大的值，否则head将为您包装输出。

---
title: "Horizontal scroll for wide output"
output:
xaringan::moon_reader:
css: ["default"]
nature:
highlightLines: true
---
```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
```
```{css, echo=FALSE}
pre {
background: #FFBB33;
max-width: 100%;
overflow-x: scroll;
}
```
```{r}
library(ggplot2movies)
op <- options("width"=250) # large number to trick head, otherwise see next slide
head(movies)
options(op) # set options back to default
```
---
```{r}
head(movies) # head with default width, note text gets wrapped. Though you can still scroll horizontally, as an effect of setting `pre`
```