ggplot1 is an update of ggplot, the package that preceded ggplot2. ggplot1 is mostly made available out of historical interest, to illustrate how my thinking about API design in R has evolved over the years. I've made a few minor tweaks to the package, mostly fixing small things that obscure the interesting parts of the API.
ggplot had 7 CRAN releases starting with 0.2.2 in April 2006, and finishing with 0.4.2 in October 2008.
You can install ggplot1 from github with:
# install.packages("devtools")
devtools::install_github("hadley/ggplot1")
library(ggplot1)
mtcars %>%
ggplot(list(x = mpg, y = wt)) %>%
ggpoint()
mtcars %>%
ggplot(list(x = mpg, y = wt)) %>%
ggpoint(list(colour = gear)) %>%
scbrewer()