help

I Remember that if you have questions about a particular R function, you can access its documentation I with a question mark followed by the function name: ?function_name_here. However, in the case of an I operator like the colon used above, you must enclose the symbol in backticks like this: ?':? 1 (NOTE: The backtick (') key is generally located in the top left corner of a keyboard, above the I Tab key. If you don't have a backtick key, you can use regular quotes.) I Pull up the documentation for ": ' now. 30x