Download Table in RMarkdown

[kentm]

I am attempting to add a simple download button to an Rmarkdown report but it seems like the button downloads the entire report and not the table of interest. For example, in my RMarkdown I have:

shiny::downloadHandler(
  filename = "mtcars.csv",
  
  content = function(file) {
    write.csv(mtcars, file)
  }
)

with a YAML header of:

runtime: shiny
output: 
  html_document:
    number_sections: true

The handler generates a button but the button does not download the mtcars data, it downloads the entire html report. I'm running rmarkdown::render to generate the report.

Any assistance on adding download buttons to RMarkdown reports would be greatly appreciated.

[cderv]

@kentm

I'm running rmarkdown::render to generate the report.

Don't know if this is related but with shiny document, you should use rmarkdown::run

19.1 Getting started | R Markdown: The Definitive Guide

or the Knit button...

If you want further debug, can you share a full minimal reproducible example and not only pieces of code ?
Thank you!

[kentm]

Ah, right - using shiny functions, you can't generate a standalone html output. I found a solution using xfun::embed_file, it's not as elegant but it works.

Thanks!

[cderv]

@kentm

I found a solution using xfun::embed_file , it's not as elegant but it works.

I find it elegant ! That is a perfect solution to include a file in a static file. If you want a button rather than a link, you can try this

Implement Download Buttons in rmarkdown

And

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[kentm]

Oh - awesome. The downloadthis package looks to solve this issue completely. I implemented some custom CSS to change the xfun::embed_file link into a button but it requires the extra step of saving out a file first to pass into the function. downloadthis looks like it works directly with data frames in R by wrapping the saving/button creation into one step, which is perfect.

Thanks for the recommendation!