Modern R Programming Cookbook

How to do it…

Let’s write the function with the error handler implemented inside the body of the function. There are several ways to handle the exception, using the following steps:

1. Let's take a look at the use of the stop() function in the following code snippet:

        logX <- function(numVec1){          if(any(numVec1<0))            stop("A negative value exists")          else logV1 <- log(numVec1)          return(logV1)        }

2. Let's take a look at the use of the try() function in the following code snippet:

        logX1 <- function(numVec1){          try(logV1 <- log(numVec1))          return(logV1)        }

3. Let's take a look at the use of the tryCatch() function in the following code snippet:

        logX2 <- function(numVec1){          tryCatch(            return(logV1 <- log(numVec1)), warning = function(w) print("A negative input ...