问题描述
'asis'块对于在Markdown文档中输出对象列表非常有用,请参见以下示例: Highcharter , DT ,传单,...
但是,在上述示例中,如果在上一个块中未调用渲染器一次,则对象列表将不会打印,因此将其初始化:这是一个棘手的解决方法,而我找到解决方案的更多原因是尝试/错误,而不是在文档中找到它.
这是一个可复制的问题,也发布在 https://github.com/rstudio/rmarkdown /issues/1877 :
---
title: "Test"
output:
html_document
---
```{r,echo=F}
library(DT)
library(rmarkdown)
library(purrr)
library(knitr)
df_list <- list("cars" = mtcars, "flowers" = iris)
knitr::opts_chunk$set(echo = FALSE, warning = FALSE, message = FALSE)
```
```{r}
# If this first initialization isn't run, tabs won't print
DT::datatable(data.frame())
```
# Test tabs {.tabset}
```{r, results='asis' }
imap(df_list, ~{
cat('## Subtab ',.y,'\n')
cat('\n')
DT::datatable(.x) %>%
htmltools::tagList() %>% as.character() %>% cat() })
```
@cderv给出了我的问题的答案:
https://github.com/rstudio/rmarkdown/issues/1877#issuecomment- 679864674
由于@yihui喜欢此答案,因此暗示使用htmlwidget
上的cat + asis
应自担风险.
但是,我将继续使用问题中提到的解决方法,因为只要可行,我就会发现它非常实用.
感谢@atusi& @cderv的宝贵意见.
'asis' chuncks are very useful to output a list of objects in a Markdown document, see following examples : Highcharter, DT, Leaflet, ...
However, in the above examples, the list of object won't print if the renderer hasn't been called once in a previous chunck, so that it gets initialized : this is a tricky workaround, and I found the solution more by trial / error than by finding it in documentation.
This is a reproducible issue also posted on https://github.com/rstudio/rmarkdown/issues/1877 :
---
title: "Test"
output:
html_document
---
```{r,echo=F}
library(DT)
library(rmarkdown)
library(purrr)
library(knitr)
df_list <- list("cars" = mtcars, "flowers" = iris)
knitr::opts_chunk$set(echo = FALSE, warning = FALSE, message = FALSE)
```
```{r}
# If this first initialization isn't run, tabs won't print
DT::datatable(data.frame())
```
# Test tabs {.tabset}
```{r, results='asis' }
imap(df_list, ~{
cat('## Subtab ',.y,'\n')
cat('\n')
DT::datatable(.x) %>%
htmltools::tagList() %>% as.character() %>% cat() })
```
The answer to my question has been given by @cderv :
https://github.com/rstudio/rmarkdown/issues/1877#issuecomment-679864674
As this answer has been liked by @yihui, it gives a hint that cat + asis
on htmlwidget
should be used at one's own risk.
However, I'll personnaly continue to use the workarounds mentioned in the question, because as long as it works I find it very practical.
Thanks @atusi & @cderv for their valuable input.
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