How to list all installed R-packages

I don’t use R, and nor I do know much about it. However, I maintain R’s installation on linux machines at work.

Today, I learned a new trick to list all installed R-packages. Here it is:

ip = as.data.frame(installed.packages()[,c(1,3:4)])
ip = ip[is.na(ip$Priority),1:2,drop=FALSE]
ip

And here is the sample output:

Type 'license()' or 'licence()' for distribution details.

  Natural language support but running in an English locale

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> ip = as.data.frame(installed.packages()[,c(1,3:4)])
> ip = ip[is.na(ip$Priority),1:2,drop=FALSE]
> ip
                  Package   Version
akima               akima    0.5-12
alr3                 alr3     2.0.5
BRugs               BRugs     0.8-6
car                   car     2.1-2
coda                 coda    0.18-1
colorspace     colorspace     1.2-6
DEoptimR         DEoptimR     1.0-5
dichromat       dichromat     2.0-0
digest             digest     0.6.9
distillery     distillery     1.0-2
extRemes         extRemes     2.0-7
fields             fields     8.4-1
...

I don’t have time to explain what each line does. If you’re curious, you can check out using the references below: