#SNIPPIT FUNCTION HAS NOT BEEN DEFINED CODE#

Note that it’s still possible to take the name of an existing function for your own UDF but that it’s not recommended It will require you to hide the one function from the other! In R, according to the base docs, you define a function with the construct function (arglist) ? OurFunctionName, you know it is better not to use that name because it has already been taken. (For the horrified reader, here’s a link: semantics). You’ll denote each of those constructs generically as ‘functions’, mainly because in R we just have…functions! There exist many terms to define and express functions, subroutines, procedures, method, etc., but for the purposes of this post, you will ignore this distinction, which is often semantic and reminiscent of other older programming languages.

You will see that there are functions that operate on some of the input values, perhaps giving multiple results, depending on how they are internally constructed. Here, you’ll use a simple definition dropping the math restriction that “the property that each input is related to exactly one output”. Generically, its arguments constitute the input and their return values their output. In fact, there are several possible formal definitions of ‘function’ spanning from mathematics to computer science.

#SNIPPIT FUNCTION HAS NOT BEEN DEFINED CODE#

A function is a piece of code written to carry out a specified task it can or can not accept arguments or parameters and it can or can not return one or more values. In programming, you use functions to incorporate sets of instructions that you want to use repeatedly or that, because of their complexity, are better self-contained in a sub program and called when needed.

Snippit function has not been defined