[R] Running R from a read-only CD

Duncan Murdoch murdoch at stats.uwo.ca
Mon May 25 22:57:03 CEST 2009

On 25/05/2009 4:40 PM, Charles Annis, P.E. wrote:
> Dear R-helpers:
> I created a folder containing R on a read-only CD and use it by having the
> R-icon, located on the Windows desktop, point to the CD 
> (R-2.8.1\bin\Rgui.exe) for the "Target," and to a Windows Desktop folder for
> "Start in."
> This works nicely EXCEPT that the R help() function cannot display anything,
> and presents a screen message saying "This program cannot display webpage."
> This is especially frustrating because on the left of what would be the help
> window is the exhaustive list of all the functions for which R can provide
> help (but can't display anything).
> Can anyone provide guidance?
> Here is the obligatory session information:
> ....................
>> sessionInfo()
> R version 2.8.1 (2008-12-22) 
> i386-pc-mingw32 
> locale:
> LC_COLLATE=English_United States.1252;LC_CTYPE=English_United
> States.1252;LC_MONETARY=English_United
> States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252
> attached base packages:
> [1] splines   tcltk     stats     graphics  grDevices utils     datasets
> methods   base     
> other attached packages:
> [1] mh1823_2.5.4.1     survival_2.35-3    RColorBrewer_1.0-2 RODBC_1.2-5
> ....................
> Thanks!

This sounds like a Windows security feature, because .CHM is a risky 
format.  There's a page here


that tells you how to turn it off.  Alternatively, you can choose one of 
the other help formats in R besides CHM help.

Duncan Murdoch

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