Preview and render without executing code

[cjackst11]

Description

Hello

I am using Quarto for developing coding assignments. It is really fantastic, but there one thing I can't do.

I need to make pdf/html with code only, accomplished by ```r, but develop the quarto file with ```{r} so code executes to make sure my code is correct. At the moment, I search and replace all ```{r} for ```r, but is there some command line switch that makes that automatic?

Thanks for this wonderful program.

best Jack

[cderv]

You can control execution using some YAML option. For example, you can deactivate all evaluation using

execute:
  eval: false

See https://quarto.org/docs/computations/execution-options.html

Another option would be to use a Project, and the freeze option: https://quarto.org/docs/projects/code-execution.html#freeze
This will render the document once with execution, and then prevent execution unless you explicitly render.

It depends what you need exactly - possibly eval: false is what you need here !

[cjackst11]

Thanks @cderv !

This actually is not what I was looking for, I want code to execute in VScode, so I can make sure it it correct. I just don't want code to execute when I render/preview the files, and only show the code. Reason is that the html/pdf files ultimately go to students and the TAs, and they are to execute the code themselves. So am really after a command line switch, not a yaml switch. This is easy to do with a small sed script on the command line for render, (not for preview) but that is very clumcy.

At the moment I am using a on file change command to change all the {r} to r and make a new file, but that is super clumcy.

best jd

[mcanouil]

How eval: false does not fit what you want?
Code cells can still be executed manually in RStudio or VSCode, while when you render/preview the code is not evaluated.

It seems you want to render for yourself with eval: true and for the others with eval: false.
If that's the case, you can use project profiles, see https://quarto.org/docs/projects/profiles.html.

[cjackst11]

@mcanouil Yes, I should have had my coffee before responding. That makes perfect sense. I am still coming to grips with Quarto, and this eventuality escaped me.

And Quarto is truly fantastic.

best, j