Modern R Programming Cookbook

How to do it…

To write a function, the first and most important thing is the name of the function. Let's perform the following steps to write your first function in R:

1. You must give a name to the new function that you are going to write. The name of the function must start with a character. The function name could start with a dot (.) or with an underscore (_). Now, let’s give the name of the new function for this recipe as fsdByMean:

        fsdByMean <- function(vectorInput){          average <- mean(vectorInput)          std <- sd(vectorInput)          stdByMean <- std/average          return(stdByMean)        }

2. Now, to use the function, you should call it as follows:

        fsdByMean(vectorInput = V1)        [1] 0.5335133