Quarto: Parsing an expression to chunk labels-CodePudding

I am trying to pass an expression to a YAML chunk label in Quarto using R. I know how to do this for knitr chunk options in R Markdown (and I also know that this works well in Quarto). However, I would like to know if this is possible using the current labeling idiom.

For example, with the following source...

...I can generate some output that has figure captions as well as cross-references.

To be clear, using the normal chunk options, I want to use the second chunk like this:

```{r}
#| label: fig-plot-cars
#| fig-cap = <cap>
#| echo: false
plot(cars)  
```

where <cap> is the variable created earlier (or any expression) that returns a string for the figure caption.

CodePudding user response：

You could use !expr in your fig-cap: to parse an R expression like this:

---
title: ""
format: html
---

```{r}
#| label: caption
#| include: false
cap <- 'Displacement vs Speed'
```

See @fig-plot-cars.

```{r fig.cap = cap}
#| label: fig-plot-cars
#| fig-cap: !expr cap
#| echo: false
plot(cars)  
```

Output: