问题
Is it possible to get all of the code in a appendix. Say I have two chunks in a document and then some text.
```{r, echo=TRUE}
x <- 4+5
x
```
Above is X output.
```{r, echo=TRUE}
y <- 22+325
y
```
Above is Y output.
And then I want all of the code in a appendix but shown as if I put eval=FALSE in the chunk.
Something like this
```{r, SHOW_ALL_CODE=TRUE}
```
Expected output:
Chunk_1
y <- 22+325
y
Chunk_2
x <- 4+5
x
回答1:
knitr::purl() can extract all R code from a markdown file into an R script. You can add that as an appendix.
## appendix
```{r code=readLines(knitr::purl('~/path/to/file.Rmd', documentation = 0)), eval = FALSE}
```
回答2:
Another possibility:
### Appendix
```{r, ref.label=knitr::all_labels(),echo=TRUE,eval=FALSE}
```
as suggested by Yihui's nice example
回答3:
You could use a reference to your initial chunks, but then change the options:
main text
```{r blah, echo = FALSE}
summary(cars)
```
appendix
```{r blah2, ref.label='blah', eval = FALSE}
```
Which will give:
来源：https://stackoverflow.com/questions/33485893/create-appendix-with-r-code-in-rmarkdown-knitr