在Rmarkdown中从`for`循环使用`ggplotly`和`DT` [英] Using `ggplotly` and `DT` from a `for` loop in Rmarkdown

问题描述

是否可以在<$ c $中使用 ggplotly（）或 datatable（）在RMarkdown中c> for 循环还是函数？示例：

Is that possible to use ggplotly() or datatable() in RMarkdown from inside a for loop or function? Example:

---
title: "Using `ggplotly` and `DT` from a `for` loop in Rmarkdown"
output: html_document
---

```{r setup, include=FALSE}
library(ggplot2); library(DT)
```

## Without `for` loop - works

```{r}
datatable(cars)

g <- ggplot(cars) + geom_histogram(aes_string(x=names(cars)[1] ))
ggplotly(g) 
```

## From inside the `for` loop  - does not work (nothing is printed)

```{r}
for( col in 1:ncol(cars)) {

  datatable(cars)          # <-- does not work 
  print( datatable(cars) ) # <-- does not work either

  g <- ggplot(cars) + geom_histogram(aes_string(x=names(cars)[col] ) )

  ggplotly (g)            # <-- does not work 
  print ( ggplotly (g) )  # <-- does not work either
}
```

我想知道这是否是因为 interactive 的输出根本无法 print -

这样的问题

I wonder if this is because interactive outputs cannot be print-ed at all - by design.
No such problem existing when printing non-interactive outputs.

PS
这与以下内容有关：
在Rmarkdown中自动生成预格式化文本，使用R

在rmarkdown中循环头文件/节？

推荐答案

这是帖子我在我的评论中根据您的情况添加了

This is the solution from the post I added in my comment adapted to your case:

---
title: "Using `ggplotly` and `DT` from a `for` loop in Rmarkdown"
output: html_document
---

```{r setup, include=FALSE}
library(plotly); library(DT)
```

```{r, include=FALSE}
# Init Step to make sure that the dependencies are loaded
htmltools::tagList(datatable(cars))
htmltools::tagList(ggplotly(ggplot()))
```

```{r, results='asis'}
for( col in 1:ncol(cars)) {
  
  print(htmltools::tagList(datatable(cars)))
  
  g <- ggplot(cars) + geom_histogram(aes_string(x=names(cars)[col] ) )

  print(htmltools::tagList(ggplotly(g)))

}
```

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