问题
As known in RMarkdown code chunks can be named like this:
```{r chunkname}
plot(x,y)
```
Is it possible to showing chunkname in output document?
回答1:
You can use knitr::opts_current$get()$label
example:
```{r cars}
library(knitr)
opts_current$get()$label
plot(cars)
```
It will also work outside of a chunk, in an inline r code. It will then output the label of the last chunk.
You can of course save the labels in a vector to use them later, for instance with a custom hook:
```{r knitr_setup}
library(knitr)
ll <- opts_current$get()$label
knit_hooks$set(label_list = function(before, options, envir) {
if(before) ll <<- c(ll,opts_current$get()$label)
})
opts_chunk$set(label_list=TRUE)
```
ll will then contain the list of chunk labels. However, you cannot access the names of chunks not yet ran.
来源：https://stackoverflow.com/questions/35038607/showing-code-chunk-name-in-output-in-rmarkdown