Look at section 6.1 of the R Installation and Admin manual.
6.1 Default packages
The set of packages loaded on startup is by default
> getOption("defaultPackages")
[1] "datasets" "utils" "grDevices" "graphics" "stats" "methods"
(plus, of course, *base*) and this can be changed by setting the option in
startup code (e.g. in ~/.Rprofile). It is initially set to the value of the
environment variable R_DEFAULT_PACKAGES if set (as a comma-separated list).
Setting R_DEFAULT_PACKAGES=NULL ensures that only package *base* is loaded.
Changing the set of default packages is normally used to reduce the set for
speed when scripting: in particular not using *methods*will reduce the
start-up time by a factor of up to two. But it can also be used to
customize R, e.g. for class use. Rscript also checks the environment
variable R_SCRIPT_DEFAULT_PACKAGES; if set, this takes precedence over
R_DEFAULT_PACKAGES.
Bill Dunlap
TIBCO Software
wdunlap tibco.com
On Sun, Sep 8, 2019 at 8:42 AM Laurent Gautier <lgaut...@gmail.com> wrote:
> Hi,
>
> When starting an embedded R I encounter the following issue under certain
> conditions:
>
> ```
> Error: package or namespace load failed for ‘utils’ in if (.identC(class1,
> class2) || .identC(class2, "ANY")) TRUE else {:
> missing value where TRUE/FALSE needed
> ```
> (more such errors for grDevices, graphics, and stats)
>
> And in the end:
>
> ```
> Warning messages:
> 1: package ‘utils’ in options("defaultPackages") was not found
> 2: package ‘grDevices’ in options("defaultPackages") was not found
> 3: package ‘graphics’ in options("defaultPackages") was not found
> 4: package ‘stats’ in options("defaultPackages") was not found
> ```
>
> While the embedded R appears functional, no package can be loaded.
>
> The erorr message from R (`missing value where TRUE/FALSE needed`) suggests
> that R should be able to catch the underlying issue (I am yet to find what
> it is) earlier and with this make the task of troubleshooting easier.
>
> Best,
>
>
> Laurent
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
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> https://stat.ethz.ch/mailman/listinfo/r-devel
>
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