Gain insights into R, the leading language for data analysis. Learn about its basics, advanced concepts, and practical coding to drive valuable insights from large datasets.

The digital world we live in has given companies and people access to staggering amounts of data, and anyone that can make use of that to drive valuable insights stands to benefit. The ability to work with large amounts of data is becoming a standard requirement for countless jobs across multiple industries.

Enter R, probably the most well-known language for data analysis. It's been used for years due to its robust statistical functionality, outstanding graphing ability, and extensibility through packages.

This interactive course will get you up to speed and assumes no prior knowledge of R. You'll start with the very basics and work your way up to advanced concepts like exception handling. By the time you're done, you'll be able to write detailed, useful code in R yourself.

Learn R from Scratch

# Problem Statement
Implement a function `calculateLog()` that takes a `testVariable` and prints its `log`. If the **logarithmic value** of the `testVariable` is not possible, print "This operation is not allowed!"

> Use the `cat()` function for printing!

## Input
A `testVariable` containing the data whose **logarithmic value** needs to be found.

## Output
The correct output based on the `testVariable`.

## Sample Input
```
"a"
```
## Sample Output
```
This operation is not allowed!
```
## Test Yourself
Write your code in the given area. If you get stuck, you can look at the solution.

calculateLog <- function(testVariable)
{
    # Write your code here
    cat(" ")
}

calculateLog <- function(testVariable)
{
    tryCatch(
        {
            cat(log(testVariable))
        }, 
        error = function(e) 
        {
            cat("This operation is not allowed!")
        },
        warning = function(w) 
        {
            cat("This operation is not allowed!")
        })
}

---
In the next lesson, we have a solution review of this exercise.

Let's test your understanding of using try catch in R code.

Getting Started

Variables

Exploring R Objects

R Operators and Notation

Conditional Statements

Loops

Functions

Input/Output

Exception Handling

Classes

Fun Challenges

Conclusion

Exercise 17: Try Catch

Problem Statement

Input

Output

Sample Input

Sample Output

Test Yourself