Similar feature to rstack, but for incremental plotting

[sandyspiers]

Description

It would really cool to have feature similar to rstack, but for multiple figure outputs from code blocks for presentations.

For example, the following code block outputs 3 plots, and these plots are just laid out one after another (as expected):

---
format: revealjs
engine: julia
---

## Example

```{julia}
#| output: none
using Plots
```

```{julia}
p = plot()
for i in [1, 2, 3]
  plot!(p, [i], [i])
  display(p)
end
```

But for plots where we want to add elements incrementally it would be handy to have a feature like rstack that allows each incremental addition to be a new image. This would allow us to flick through each slide in the presentation, and incrementally build the figure.

Obviously, there are work arounds. We could duplicate the slide as many times as needed, showing each other figure, or save the figures and then use native markdown insert with rstack. But this is fairly annoying if the incremental plotting is wrapped in a for loop (like the example).

Thanks :)

[mcanouil]

Why not use .r-stack? There is no need for something else.

I'm not an expert in Julia, but something like the code below should work:

---
format: revealjs
engine: julia
keep-md: true
---

```{julia}
#| output: none
using Plots
```

## Example 1

::: {.r-stack}

```{julia}
#| output: asis
p = plot()
for i in [1, 2, 3]
  plot!(p, [i], [i])
  print("\n::: {.fragment}\n")
  display(p)
  print("\n:::\n")
end
```

:::

## Example 2

::: {.r-stack}

```{julia}
#| output: asis
p = plot()
for i in [1, 2, 3]
  plot!(p, [i], [i])
  png(p, "plot$i.png")
  print("\n![](plot$i.png){.fragment}\n")
end
```

:::

[sandyspiers]

Oh awesome thanks. Example 1 does not work for me, but example 2 does. I had not considered that quarto would listen to print statements as if they were markdown statements. Thanks also for highlighting the keep-md: true option, that is very helpful!!