Need the filename of the Rnw when knitr runs in rS

问题:

When working on a reproducible research project, I would like to know the name of the Rnw file that is being run to use as an R variable.

This would be analogous to inserting an MSExcel filename in a footer

I am using RStudio Server on Ubuntu.

Thank you.

回答1:

You can use the following two idioms to fetch the directory and name of the current file in knitr:

knitr:::.knitEnv$input.dir
knitr:::knit_concord$get("infile")

This is independent of RStudio, the knitr package is entirely responsible for this. These are private functions and variables that can change at any time without notice, so if you need something reliable, you might want to file an issue on GitHub.

回答2:

knitr now has a method for this: current_input()

https://github.com/yihui/knitr/issues/701