使用"\ n"将文本包装在knitr :: kable表单元格中 [英] wrap text in knitr::kable table cell using "\n"

问题描述

如何使用\n将单元格包装在knitr::kable表单元格中?

How can I wrap a cell in a knitr::kable table cell using \n?

我想生成一个.rmd文件，其中包含一些表，其中一列需要换行.包装应发生的地方用\n标记.我尝试过(这是一个独立的.rmd文件):

I want to generate a .rmd file containing some tables where one column needs text wrapping. The places where the wrapping should occur are marked with \n. I tried (this is a standalone .rmd document):

---
output: pdf_document
---

## A Table with text wrap

```{r cars}
knitr::kable(data.frame(col1 = c("a", "b"), col2 = c("one\ntwo", "three\nfour")))
```

..但这不起作用.包裹的部分将保留在col1的下一行中，而不是留在col2中.

..but this doesn't work. Instead of staying in col2, the wrapped part lives on the next line of col1.

预期输出为:

col1 | col2
-------------
a    | one
     | two
b    | three
     | four

欢迎使用除knitr以外的其他程序包的解决方案，只要它们允许(几乎)打印出精美的图像即可.

Solutions using other packages than knitr are welcome as long as they allow to print (nearly) as nice.

推荐答案

一劳永逸的解决方案，用于标准表的灵活双HTML/PDF.它包含了@snoram概述的kableExtra的换行功能.
假设:您将<br>用作换行指示器.

A fire-and-forget solution for flexible dual HTML/PDF of standard tables. It incorporates kableExtra's linebreak function outlined by @snoram.
Assumption: You use <br> as your line break indicator.

```{r}
knit_table(df1)
```

library(dplyr)
library(knitr)
library(kableExtra)

knit_table <- function(df){
  if (is_html_output()) {
    df %>%
      kable("html", escape = F) %>%
      kable_styling()
  } else {
    df <- data.frame(lapply(df, function(x) {gsub("<br>", "\n", x)}), stringsAsFactors = F)

    df %>%  
      mutate_all(linebreak) %>%
      kable("latex", booktabs = T, escape = F)  
  }
}

数据

df1 <- data.frame(col1 = c("a", "b"),
                  col2 = c("one<br>two", "three<br>four"))

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