The most recent release of R is currently available from the command-line but not yet fully supported for web applications.

Packages

You can install CRAN packages within your own library. When you first try to install a package, R will let you know that you cannot write to the system-wide default library and then offers to create one in your home directory, located at ~/R/. All of your installed packages will live there.

For example, you can install caret within R by typing the following:

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install.packages("caret")