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

## Solution #1: Performing each Test Separately

testVariable <- 19
test1 <- testVariable > 4
test2 <- testVariable < 10

result <- test1 && test2
cat(result)

### Explanation
Our task was to check whether the `testVariable` lies between $4$ and $10$. For that, we first check whether the number is **greater** than $4$ and store the result in a variable `test1`. Then we check whether the number is **less** than $10$ and store the result in variable `test2`. Later, we take the `&&` of the two variables so that we can check whether both the tests pass or not and print the result.

## Solution #2: Using One Boolean Expression

testVariable <- 19
cat(testVariable > 4 && testVariable < 10)

cat(testVariable > 4 && testVariable < 10)

### Explanation

The above method is simpler. Just use relational and logical operators to make a boolean equation and print the result. R compiler is smart enough to compute the value of `testVariable > 4` first then compute the value of `testVariable < 10` and later **AND** their results. This is because the **relational operators** have higher precedence than **logical operators**. So, they are executed first and then the logical operators are applied.

# Solution #1: Performing each Test Separately

## Explanation
Our task was to check whether the `testVariable` lies between $4$ and $10$. For that, we first check whether the number is **greater** than $4$ and store the result in a variable `test1`. Then we check whether the number is **less** than $10$ and store the result in variable `test2`. Later, we take the `&&` of the two variables so that we can check whether both the tests pass or not and print the result.

# Solution #2: Using One Boolean Expression

## Explanation

The above method is simpler. Just use relational and logical operators to make a boolean equation and print the result. R compiler is smart enough to compute the value of `testVariable > 4` first then compute the value of `testVariable < 10` and later **AND** their results. This is because the **relational operators** have higher precedence than **logical operators**. So, they are executed first and then the logical operators are applied.

In this review, we give a detailed analysis of the solution to this problem.

Getting Started

Variables

Exploring R Objects

R Operators and Notation

Conditional Statements

Loops

Functions

Input/Output

Exception Handling

Classes

Fun Challenges

Conclusion

Solution Review: Relational and Logical Operators

Solution #1: Performing each Test Separately

Explanation

Solution #2: Using One Boolean Expression

Explanation