Modern R Programming Cookbook

The use of the ifelse vectorised conditional operator

Whenever you need to compare something in two states, either true or false, then the if statement is the most appropriate method to use. For example, suppose you are working in a dataset and you need to transform a numeric variable into another binary variable based on a fix cut-off value. This is the most typical situation where you want to test the condition and then perform the transformation. If the condition is true, then you will go for one action, and if the condition is false, then you will go for an alternative action. In this recipe, you will see an example of this type of situation with implementation.