What command converts knitr R Markdown into Stack-Exchange-friendly Markdown?

Question

Motivation: I often want to paste the results of a quick analysis using R Markdown into a StackExchange site. This includes the R-tag on Stack Overflow, Cro

Answer 1

Although I'd still like to read other suggestions I hacked together this script using @Ramnath's answer as a starting point. It outputs a HTML fragment rather than Markdown.

Rscript -e 'rmd_file <- dir(pattern="rmd"); md_file <- sub("rmd", "md", rmd_file); html_file <- sub("rmd", "html", rmd_file); require(methods); require(knitr); require(markdown); opts_knit$set(upload.fun = imgur_upload); knit(rmd_file); markdownToHTML(md_file, html_file, options="fragment_only") '

• It assumes that there is a single rmd file in the working directory. I imagine that selecting the rmd file could be done in a more sophisticated way.
• It requires that the knitr and markdown packages are installed.
• I think because we are using 'Rscript' the methods package needs to be loaded.
• It uploads images to imgur
• markdownToHTML exports only the code fragment as a html file. The contents of this file can then be copied into the Stack Exchange answer.

The result looks pretty good. It overcomes the issue of excessive blank lines. However, the output is not markdown, which makes the result harder to edit.