Parse R source file and return R markdown

Parses an R source file and returns an R markdown document that can be turned into a human readable documentation of what the source file does.

Usage

r2rmd(file, out=paste(file, "md", sep=""), header=TRUE, extra)

Arguments

file: a file name or connection (see readLines.
out: an output file name passed to writeLines, or NULL (no file written).
header: logical, if a yaml header (enclosed between triple dashes, ---) is to be parsed.
extra: character, optional string that is placed into the code chunk openings.

Details

Leading double hashes ## treated as non-code. Leading # followed by other than # is code comment. Leading # after whitespace is code comment. A newline is code when preceded and followed by code.

The leading double hash ## is trimmed for comment lines. R markdown chunk start/end stuff is added for code chunks. The argument extra adds chunk arguments, e.g. extra=', eval=FALSE' etc. See R markdown website at https://rmarkdown.rstudio.com/

Value

Returns a character vector invisibly, and writes a file as a side effects unless out=NULL in which case no file is written.

Author

Peter Solymos <solymos@ualberta.ca>

Examples

if (FALSE) { # \dontrun{
(r2rmd(system.file("r2rmd_example.R", package="mefa4"), 
    out=NULL, extra=", eval=FALSE"))
} # }