If you have R installed, you can install the stable release of plotly by typing this in your R console:
Or you can install the development release via the devtools package:
if (!require("devtools")) install.packages("devtools") devtools::install_github("ropensci/plotly")
The version of the R package used to build this site is:
packageVersion("plotly") #>  '188.8.131.5200'