I am running R on Windows, not as an administrator. When I install a package, the following command doesn't work:
> install.packages("zoo")
Installing package(s) into ‘C:/Program Files/R/R-2.15.2/library’
(as ‘lib’ is unspecified)
Warning in install.packages :
'lib = "C:/Program Files/R/R-2.15.2/library"' is not writable
To install a package, I have to specify a library location:
install.packages("zoo", lib="C:/software/Rpackages")
To load a package, I also have to specify the library location:
library("zoo", lib.loc="C:/software/Rpackages")
All of this is OK, but I wanted to see if I could add C:/software/Rpackages to the library path somehow and thus not have to type it each time.
As I searched online, I found that one way to do this is to edit the Rprofile.site file and to add the line
.libPaths("C:/software/Rpackages")
However, after doing this, and starting RStudio, this is the output that I get
> .libPaths()
[1] "C:/Program Files/R/R-2.15.2/library" "C:/Program Files/RStudio/R/library"
The .libPaths command that I added to the Rprofile.site doesn't seem to have had any effect! Why is this the case? Or more importantly, how can I fix the problem so that I can install and load packages without typing in the library location?
Note: if I start RStudio the .libPaths() command seems to work as it is supposed to
.libPaths("C:/software/Rpackages")
> .libPaths()
[1] "C:/software/Rpackages" "C:/Program Files/R/R-2.15.2/library"
Isn't that strange?