[R] help files for libraries that aren't in the defaults library tree

[Martin Maechler]

>>>>> "J" == J Andy Royle <jar at oriole.er.usgs.gov> writes:

    J> Hello, I created a library for a bunch of functions that I use
    J> frequently so that I dont have to carry duplicate copies around to
    J> wherever I fire up an R sesssion.  However, I have problems locating
    J> the help files for those functions.  Here are some details.

    J> I created the library "myR" and installed this in /home/royle/R
    J> using:

    J> R INSTALL -l /home/royle/R /home/royle/Rpackages/myR

    J> This went well, and I can access all of those functions in the usual
    J> way....i.e. like:

    J>  library(myR,lib.loc="/home/royle/R/")


    J> But, I found that to get the help files I have to type:

    J>  help(interp,lib.loc="/home/royle/R/")

    J> and so it is kind of a pain .....
	.........

    J> The question: is there a way to make these help files accessible
    J> when installed in a something other than the default library tree
    J> _without_ using the lib.loc option in help?

    J> Possible solution: It seems to me that I could add my new library
    J> tree to .lib.loc but wouldn't I have to create a new .lib.loc in
    J> every R session?

The online help [?.lib.loc  or ?library ..]
gives the solution:
>>   `.lib.loc' is a character vector with the
>>      locations of all library trees that R should use.  It
>>      is initialized at startup from the environment variable
>>      `RLIBS', which should be a colon-separated list of
>>      directories at which R library trees are rooted, and
>>      `.Library'.

So,

1) in a  [t]csh environment, you'd write in your  ~/.login

	setenv RLIBS /home/royle/R

2) in  [ba|k]sh	environment, you'd have in your ~/.profile

	RLIBS=/home/royle/R  export RLIBS

---
Martin





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