ReadCodeChunks: Read Knitr Code Chunks
In inlmisc: Miscellaneous Functions for the USGS INL Project Office

Description Usage Arguments Details Value Author(s) Examples

Read knitr code chunks into the current session.

1	ReadCodeChunks(path)

path

'character' string. Path name of the knitr source document (‘.Rnw’ or ‘.Rmd’), or R code that has been extracted from a knitr source document (‘.R’).

If the source document is ‘.Rnw’ or ‘.Rmd’ the purl function is used to extract the R code. The R code is read into the current session using a chunk separator of the from ## ---- chunk-name (at least four dashes before the chunk name) in the script. Unnamed chunks (that is, chunk-name is missing) will be assigned names like unnamed-chunk-i where i is the chunk number.

A 'list' of length equal to the number of code chunks in path. Each list component is named after its corresponding chunk name (chunk-name). The returned object includes the value of the path argument as an attribute.

J.C. Fisher, U.S. Geological Survey, Idaho Water Science Center

file <- system.file("misc/knitr-markdown.Rmd", package = "inlmisc")
chunks <- ReadCodeChunks(file)
print(chunks)
attr(chunks, "path")

txt <- chunks[c("unnamed-chunk-3", "named-chunk-4")]
eval(parse(text = unlist(txt)))