Can markdown expressions and results be interleaved in the same block?

Question

A simple chunk in R markdown: ```` ```{r} 1 + 2 3 + 4 ``` ```` Would produce the following when knitr converts to html: ```

1 + 2

## 3

3 + 4

## 7

``` I'm trying to output the expressions and results in one block ```

 1 + 2 ## 3 3 + 4 ## 7

``` I've tried tinkering around with the chunk parameters (e.g. results and echo) to no avail. Is there any way to accomplish this? Note: I could probably hack at CSS with `::first` and `::last` selectors, but I'm curious as to whether there's a built-in option.

Accepted Answer

This can be done using `hooks`. Add the following code chunk right at the top of your `Rmd` document. It uses the document hook which is run on the `md` file at the last stage of `knitting`. The hook defined below identifies subsequent code chunks without any text chunk in between and collapses it into one.

````
```{r setup, cache = F, echo = F}
knitr::knit_hooks$set(document = function(x){ 
  gsub("```
*```r*
*", "", x) 
})
```
````

NOTE. It is important to set `cache = F` in this chunk so that this code is always run.

Can markdown expressions and results be interleaved in the same block?

Solution

Problem