[R] Where can I download/install grDevices

[Lizblip]

I get the same errors:

> plotmath(area~cell,main="Myofibril areas by cell",ylab=expression("Areas
> (mu*m^2)"),xlab="")
Error: could not find function "plotmath"

> install.packages("grDevices")
Warning in install.packages("grDevices") :
  argument 'lib' is missing: using
'/home/elizabeth/R/i686-pc-linux-gnu-library/2.11'
Warning message:
In getDependencies(pkgs, dependencies, available, lib) :
  package ‘grDevices’ is not available

and when I just do this:
> install.packages()

grDevices isn't in the list that pops up


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