Question

Is there a way to inject R code output into the generated document without the sourounding format tags <pre><code class="r"> or <pre><code>? I ask this because I want to use .Rmd not .Rhmtl but at the same time inject some extra HTML lines. Doing so using e.g. cat("HTML code") will fail as the output is sourrounded by <pre><code>.

The example I try to run the follwing .Rmd file (with additional HTML lines) which file not work out right:

<script type="text/javascript">
<!--
function toggle_visibility(id) {
  var e = document.getElementById(id);
  if(e.style.display == 'none')
    e.style.display = 'block';
  else
    e.style.display = 'none';
}
//-->
</script>  

```{r}
1:10
```

<a onclick="toggle_visibility('answer_1');"><b><u>Antwort anzeigen</b></u></a>
<div id="answer_1" style=display:none>
```{r}
1:10
```
</div>

Answer 1

What I did now was following darozcig’s advice and I used JS. This solution seems tedious though. Something easier neatly fitting knitr would be nicer! Below my complete .Rmd script.

<script type="text/javascript">
<!--
function toggle_visibility(id) {
  var e = document.getElementById(id); 
  if(e.style.display == 'none')
    e.style.display = 'block';
  else
    e.style.display = 'none';
}

function answer_top(name){
  var injection1 = '<a onclick=toggle_visibility("' + name + '")><b><u>Show answer</b></u></a>\n'
  document.write(injection1 + "\n")
  var injection2 = '<div id="' + name + '"style=display:none>'
  document.write(injection2 + "\n")
}

function answer_bottom() {
  document.write("</div>" + "\n")
}
//-->
</script>  

```{r}
1:10
```

<script type="text/javascript">answer_top("answer1")</script>
```{r}
1:10
```
<script type="text/javascript">answer_bottom()</script>