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For that purpose, you can load it with the library function, specifying the package name with or without quotation marks. install.packages("calendR")Īfter installation, you need to load the package if you want to access its functions. As an example, we are going to install the calendR package, that allows creating monthly and yearly calendars, but you can install the package you prefer. Once you decided what package to install, just call the install.packages function with the name of the package inside the parenthesis with quotation marks. There are all type of packages, from graphics packages as the well-known ggplot2 to very specific topics like the DTDA.cif package, that implements estimators for cumulative incidences of competing risks under double-truncation. Most of them have been developed by Data Scientists, Statisticians, Professors and researchers. The Comprehensive R Archive Network ( CRAN) is the official R packages repository, with thousands of free R packages available.