RShowDoc(what, type = c("pdf", "html", "txt"), package)what can specify one of several different sources of documentation,
including the R manuals (R-admin, R-data, R-exts,
R-intro, R-ints, R-lang), NEWS,
COPYING (the GPL licence), any of the licenses in
share/licenses, FAQ (also available as
R-FAQ), and the files in R_HOME/doc. Only on Windows, the R for Windows FAQ is specified by rw-FAQ.
If package is supplied, documentation is looked for in the
doc and top-level directories of an installed package of that name.
If what is missing a brief usage message is printed.
The documentation types are tried in turn starting with the first
specified in type (or "pdf" if none is specified).
help (or
?) and help.start. For type = "txt", file.show is used.
vignettes are nicely viewed via RShowDoc(*, package= . ).