6 R Function: Help
6.1 
Help
?function_namehelp(function_name)- In RStudio, put cursor on the function name and press
F1key
6.2 Help structure
function_name{package_name}
The name of the function including the name of the library that includes the function.
Description
A short summary of what the function does.
Usage
An example of how you would type the function. Each argument of the function will appear in the order R expects you to supply it (if you don’t use argument names).
Arguments
A list of each argument the function takes, what type of information R expects you to supply for the argument, and what the function will do with the information.
Details
A more in-depth description of the function and how it operates. The details section also gives the function author a chance to alert you to anything you might want to know when using the function.
Value
A description of what the function returns when you run it.
References
Published references, if available, related to the function.
See Also
A short list of related R functions.
Examples
Example code that uses the function and is guaranteed to work. The examples section of a help page usually demonstrates a couple different ways to use a function. This helps give you an idea of what the function is capable of.