rrstudioquarto

Message from each loop iteration during quarto render

I am using a loop in R in a quarto document

When I render the quarto document via Rstudio, I would like to see in the background jobs how far in the loop the process is.

When I work interactively, this works:

species <- iris$Species |> unique()

for(i in species) {
  message(i)
  Sys.sleep(2)
}

However, when rendering, no message appears in the Background Jobs pane. I have tried with print() and cat() as well.

Is there a workaround to this?

Solution

  • The solution is to add #| message: !expr NA in the quarto code block.

    Read more here: https://github.com/quarto-dev/quarto-cli/discussions/7443

    #| message: !expr NA
species <- iris$Species |> unique()

for(i in species) {
  message(i)
  Sys.sleep(2)
}