R Programming By Example

If… else conditionals

As their name states, if…else conditionals will check a condition, and if it is evaluated to be a TRUE value, one path of execution will be taken, but if the condition is evaluated to be a FALSE value, a different path of execution will be taken, and they are mutually exclusive.

To show how if... else conditions work, we will program the same distance() function we used before, but instead of passing it the third argument in the form of a function, we will pass it a string that will be checked to decide which function should be used. This way you can compare different ways of implementing the same functionality. If we pass the l2 string to the norm argument, then the l2_norm() function will be used, but if any other ...