Other things I've tried:
library("ggplot")
which I get the message: Error in library("ggplot") : there is no package called ‘ggplot’
I've also tried > install.packages("ggplot2"), which gets me a train of downloads, but when I try > library("ggplot") , I get the message: Error in library("ggplot") : there is no package called ‘ggplot’ again