Remove Hashes in R Output from R Markdown and Knitr

Question

I am using RStudio to write my R Markdown files. How can I remove the hashes (`##`) in the final HTML output file that are displayed before the code output? As an example: ```` --- output: html_document --- ```{r} head(cars) ``` ````

Accepted Answer

You can include in your chunk options something like

```
comment=NA # to remove all hashes
```

or

```
comment='%' # to use a different character
```

More help on knitr available from here: http://yihui.name/knitr/options

If you are using R Markdown as you mentioned, your chunk could look like this:

````
```{r comment=NA}
summary(cars)
```
````

If you want to change this globally, you can include a chunk in your document:

````
```{r include=FALSE}
knitr::opts_chunk$set(comment = NA)
```
````

Remove Hashes in R Output from R Markdown and Knitr

Solution

Problem