Rattle is an R package, which is a collection of functions and data someone else has developed, and we can use it in our programs. If you already have some hands-on experience with R, then this task should be a much lighter task.
Before starting with the installation, remember that you need an active Internet connection. The following are the steps to install Rattle:
install.packages("rattle")and press Enter. The R Console will show you a list of CRAN mirrors; choose a download mirror that is the closest to your geographic location and R will download the Rattle package, as shown here: