Use value of R variable in Callout Box Caption with User Interface/Visual Quarto.

[mlamias]

Description

I am trying to display a callout box that contains an R Code chunk with a caption that is dynamically set by the value of an R variable in my environment. I am able to achieve this without any problem using the source editor in R Studio with the following code:

```{r}
mycaption<-"This is my custom caption"
```

This example places the value of mycaption into the callout box caption:

::: callout-note
## `r mycaption`

```{r}
#| eval: false
#| code: y<-LETTERS
#| echo: true

```
:::

This results in the following (and is exactly what I am trying to achieve):

Now, I am wondering if I can achieve the same result using the visual editor or IDE in R studio. When I switch back to the visual editor and click on the and click the three dots (...) on the .callout-note it displays the following:

If I modify the caption text box to be r mycaption2 and then switch back to the visual editor I see the code has been modified as follows:

::: callout-note
## r mycaption2

```{r}
#| eval: false
#| code: y<-LETTERS
#| echo: true

```
:::

As you can see the backticks have been removed from the callout-not caption (## r mycaption2). Is there a way to enter a r variable name into the visual editor caption so that backticks will appear in the visual editor as (## `r mycaption2`) so that the value of the value of the r variable will appear in my callout box caption, resulting in the same output as shown in my first output screenshot above?

[mcanouil]

I let @jjallaire answer as he is the one with the best knowledge on the visual editor.

[mlamias]

Thanks. Yes, basically, I'm hoping there is some what to simply add `r mycaption2` to the visual editor caption text box with the text being escaped in the source editor.

[mcanouil]

To note, inline expression in Quarto 1.4 (currently in pre-release state) is bringing a new homogenous inline expression syntax which will "replace" the knitr specific syntax (i.e., {r} x), see https://quarto.org/docs/prerelease/1.4/inline.

[mlamias]

Thank you. This is great!

Also, as a side note, I see there's a typo in the link you provided. Under Markdown Input, it reads:

#Not that by default, the output of inline expressions is treated as ordinary text...

But should read:

#Note that by default, the output of inline expressions is treated as ordinary text...

The "e" seems to be missing on the what should be the word "Note."

[mcanouil]

Thanks, I made a PR to fix the typo:

• fix(prelease/inline.qmd): missing "e" for "Note that" quarto-web#806