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rknitrbookdown

latex R chunk output not decorated

When using bookdown, if I have an R chunk where I want to show output but not the R code, the default decorations are missing in the pdf output.

For example, this example has a nicely formatted chunk (gray background, coloured text, etc.)

```{r test1, echo=TRUE}
1:4
```

But this one does not have any decoration.

```{r test2, echo=FALSE}
1:4
```

The contrast is easily seen below.

enter image description here

How can I produce the second example with the gray background and coloured text?

Solution

  • You can give the output block a language name, e.g.,

    ```{r test2, echo=FALSE, class.output='r'}
1:4
```

    By default, text output is generated to

    ```
```

    With class.output='lang', text output is generated to

    ```lang
```

    Without the language name, code blocks will not be syntax highlighted.