Accessing the R Documentation
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Many functions in R require several arguments, and it is impossible to remember how all functions are used correctly. Thankfully, it is not necessary to know how each function is used by heart. R Studio makes it easy for us to access the R documentation, where every function has a detailed description page.
There are two ways to search for a function documentation page. The first is to access the Help pane in the lower left corner of R Studio, and then use the search bar to find information on a specific function. A more convenient way is to simply run ? followed by the name of the function in the console, e.g. ?mean. This will open the documentation entry for this function automatically.
The R documentation of a function usually at least contains a Usage, Arguments and Examples section. The Arguments and Examples section is often particularly helpful to understand how a function is used.