Using echo = {number} removes code toggles in R Notebooks

Question

So if I have some code, such as:

---
title: "Data Exploration"
output: html_notebook
---

```{r, echo = 2}
data("mtcars")
summary(mtcars$mpg)
```

then I would expect only the 2nd line, i.e. summary(mtcars$mpg) to show in my previewed document. But what it actually does is remove all code from my previewed document and removes the show/hide code toggle button. Any idea how I can show certain lines whilst keeping the toggle button?

With `code_folding : show` and rmarkdown v1.8 your code works as expected. Can you post the whole rmarkdown file? — psychOle, Sep 25 '18 at 12:00
I've added the YAML, this is literally it. I'm on rmarkdown v1.10 — nathaneastwood, Sep 25 '18 at 12:02
`code_folding: show` isn't exactly what I want. Whilst it "hides" the code, it doesn't remove it from the preview completely. I want only the second line, i.e. the `summary()` to be included in the document — nathaneastwood, Sep 25 '18 at 12:05

score 0 · Answer 1 · answered Sep 25 '18 at 16:29

0

I would have added this as a comment, but I do not have that capability yet. This seems like it might be a bug. It works fine in the other document types. If you need to use a notebook the not so elegant work around would be to just use two chunks.

answered Sep 25 '18 at 16:29

jamesguy0121

1,124
11
28

Yeah I ended up separating it out into two separate chunks but `include = FALSE` doesn't work for the one I want to hide unfortunately. – nathaneastwood Sep 25 '18 at 16:30
Use `echo = FALSE` in the chunk that you want to exclude. That worked for me. – jamesguy0121 Sep 26 '18 at 05:10
This does work, it's just a shame that `echo = -1` doesn't. I feel it may be a bug. – nathaneastwood Sep 26 '18 at 09:57
Yea, same. Maybe open an issue on the github page. – jamesguy0121 Sep 26 '18 at 14:31

Using echo = {number} removes code toggles in R Notebooks

1 Answers1