Chapter 8. Writing R functions
If we find ourselves running the same code repeatedly, it is probably a good idea to turn it into a function. In programming it is best to reduce redundancy whenever possible. There are several reasons for doing so, including maintainability and ease of reuse. R has a convenient way to make functions but it is very different from other languages, so some expectation adjustment might be necessary.
8.1. Hello, World!
This would not be a serious book about a programming language if we did not include a “Hello, World!” example, so we will start with that. Let’s build a function that simply prints “Hello, World!” to the console.
> say.hello <- function()+ {+ print("Hello, World!"
Get R for Everyone: Advanced Analytics and Graphics now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
