There are two R directories on my computer:
one is /home/R-2.15.2,the other is /home/R-2.15.1,
when I input R , I can start R, now I want to know which R is running: 2.15.1 or 2.15.2?
6 Answers
05/20/2021 Update:
It should be R.version now
In addition to @Piotr Jaszkowski, R.Version() should do the work as well
Run R --version there's info about version on the first line.
Edit: If you ask this question then I bet that R is not running from any of these directories. Check $PATH env variable to get information where binaries are looked for and in which order.
Edit 2: Use type shell command to find where binary for given command is stored, -a for all paths, -f for the hashed one (basically: most recently used).
The builtin version will show this.
> version _
platform x86_64-apple-darwin9.8.0
...
version.string R version 2.15.2 (2012-10-26)version is a named list with 14 items, really you just want to see:
> version[['version.string']] _
[1] "R version 2.15.2 (2012-10-26)"and in fact if you only want the version-string:
> strsplit(version[['version.string']], ' ')[[1]][3]
[1] "2.15.2"Type builtins() to see all the builtins.
POSTSCRIPT: turns out version and R.version (mentioned by nathaninmac) are aliases for the same thing.
Try sessionInfo()
Next to the R version it also returns the versions of the loaded packages and more.
This will do the trick as well
paste0(R.Version()[c("major","minor")], collapse = ".")You can type 'which R' to which R binary gets used
or type R and see something like below, that should tell you which version.
" R version 2.15.1 (2012-06-22) -- "Roasted Marshmallows" Copyright (C) 2012 The R Foundation for Statistical Computing .. .. "
