Statistical Analysis with R

The digital world we live in has given companies and people access to staggering amounts of data, and anyone who 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.

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

This interactive module will get us up to speed with R and assumes no prior knowledge of it. We'll start with the very basics and work our way up to advanced concepts like exception handling. By the time we're done, we'll be able to write detailed, useful code in R.

Learn R from Scratch

testVariable <- 1
while (testVariable <= 20) { # Ccheck whether testVariable is less than or equal to 20
  if(testVariable %% 3 == 0 && testVariable %% 5 == 0)
  {
    cat(testVariable, "foo bar ")
  } else 
  {
    if(testVariable %% 3 == 0)
    {
      cat(testVariable, "foo ")
    }
    if(testVariable %% 5 == 0)
    {
      cat(testVariable, "bar ")
    }
  }
  testVariable = testVariable + 1 # increment testVariable to move on to the next number to check
}

testVariable <- 1
while (testVariable <= 20) {

  if(testVariable %% 3 == 0 && testVariable %% 5 == 0)
  {
    cat(testVariable, "foo bar ")
  } else 
  {
    if(testVariable %% 3 == 0)
    {
      cat(testVariable, "foo ")
    }
    if(testVariable %% 5 == 0)
    {
      cat(testVariable, "bar ")
    }
  }
  testVariable = testVariable + 1
}

## Explanation

One simple approach is to copy paste the **condition block (line number 4 to 17 in the above code)** $20$ times. However, this method is redundant and lengthy.

We can write a `while` loop that runs $20$ times and for each iteration checks the condition. For this, we make a variable `testVariable` whose value is $1$. Then, in each iteration, we check whether `testVariable` is less than or equal to $20$, and also increment at the end of each iteration.

In this review, we provide 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: while Loops

Solution: Using `while` Loop

Explanation