logical: should this attempt to update the package index to
reflect the currently available packages. (Not attempted if
remote is non-NULL.)
just for compatibility with S-PLUS.
the name of the program to be used as hypertext
browser. It should be in the PATH, or a full path specified.
Alternatively, it can be an R function which will be called with a
URL as its only argument. This option is normally unset on Windows,
when the file-association mechanism will be used.
A character string giving a valid URL for the
R_HOME directory on a remote location.
Unless remote is specified this requires the HTTP server to be
available (it will be started if possible: see
One of the links on the index page is the HTML package index,
R.home("docs")/html/packages.html, which can be remade by
make.packages.html(). For local operation,
the HTTP server will remake a temporary version of this list when the
link is first clicked, and each time thereafter check if updating is
needed (if .libPaths has changed or any of the
directories has been changed). This can be slow, and using
update = TRUE will ensure that the packages list is updated
before launching the index page.
Argument remote can be used to point to HTML help published by
another R installation: it will typically only show packages from the
main library of that installation.
help() for on- and off-line help in other formats.