the location and name of the Rnw file to be rendered.
biber
logical flag indicating if biber (or biblatex) backend should
be run after xelatex is called.
saveTmpFiles
logical flag indicating if intermediary files should be
kept after PDF file is created. If FALSE the files are deleted.
Value
The name of the xelatex rendered PDF.
Details
This is just a sequence of system calls that runs knitr to turn the .Rnw into
a .tex, and then calls xelatex (and biber) a few more times to make sure
citations and cross-references are correct.
Temporary files (e.g. .tex's, .log's, .aux's, etc.) are stored in a temporary
(sub)directory, tmp/.