Explain what an R package is; distinguish between the functions install.packages() and library()
Question
Explain what an R package is; distinguish between the functions install.packages() and library()
Solution
An R package is a collection of functions, sample data, and compiled code in a well-defined format. It includes documentation that describes how to use them. The R packages are the tools that help in performing tasks with R, ranging from simple tasks to complex computations. They enhance the functionality of R by allowing you to perform additional tasks.
The function install.packages() in R is used to install a package. It downloads the package from CRAN (the Comprehensive R Archive Network) and installs it in your R environment. This function needs to be run only once on your system to get the package.
On the other hand, the library() function in R is used to load a package into the R environment. Once a package is installed using install.packages(), it needs to be loaded into the session to use it. This is done using the library() function. This function needs to be run every time you start a new R session and want to use that package.
In summary, install.packages() is used to download and install a package, and library() is used to load that package into the R session for use.
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