Introduction to the R Language - Functions

Introduction to the R LanguageFunctionsBiostatistics R LanguageFunctionsFunctions are created using thefunction()directive and arestored as R objects just like anything else. In particular, they are Robjects of class function .f <- function(<arguments>) {## Do something interesting} Functions in R are first class objects , which means that they canbe treated much like any other R object. Importantly, Functions can be passed as arguments to other functionsFunctions can be nested, so that you can define a functioninside of another functionThe return value of a function is the last expression in the functionbody to be R LanguageFunction ArgumentsFunctions havenamed argumentswhich potentially argumentsare the arguments included in thefunction definitionTheformalsfunction returns a list of all the formalarguments of a functionNot every function call in

Argument Matching R functions arguments can be matched positionally or by name. So the following calls to sd are all equivalent > mydata <- rnorm(100)

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  Introduction, Language, Introduction to the r language

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