Ifelse vectorized function in R Programming - Mini Project: Build & Apply

Using the ifelse Vectorized Function in R

📖 Scenario: You are working with a list of students' scores. You want to quickly label each score as "Pass" or "Fail" based on a passing mark.

🎯 Goal: Create a vector of scores, set a passing threshold, use the ifelse function to label each score as "Pass" or "Fail", and print the result.

📋 What You'll Learn

Create a numeric vector called scores with the values 45, 67, 89, 34, 56

Create a numeric variable called pass_mark and set it to 50

Use the ifelse function with scores and pass_mark to create a character vector called results labeling scores as "Pass" or "Fail"

Print the results vector

💡 Why This Matters

🌍 Real World

Teachers and trainers often need to quickly classify student scores to identify who passed or failed.

💼 Career

Data analysts and statisticians use vectorized functions like <code>ifelse</code> in R to efficiently process and categorize data.

1

Create the scores vector

Create a numeric vector called scores with these exact values: 45, 67, 89, 34, 56

R Programming

# Create the scores vector
# Your code here

Need a hint?

Use the c() function to combine numbers into a vector.

2

Set the passing mark

Create a numeric variable called pass_mark and set it to 50

R Programming

scores <- c(45, 67, 89, 34, 56)
# Create the pass_mark variable
# Your code here

Need a hint?

Assign the number 50 to the variable pass_mark using the assignment operator <-.

3

Use ifelse to label pass or fail

Use the ifelse function with scores and pass_mark to create a character vector called results that contains "Pass" if the score is greater than or equal to pass_mark, otherwise "Fail"

R Programming

scores <- c(45, 67, 89, 34, 56)
pass_mark <- 50
# Use ifelse to create results vector
# Your code here

Need a hint?

The ifelse function takes three arguments: a condition, a value if true, and a value if false.

4

Print the results vector

Print the results vector using the print() function

R Programming

scores = pass_mark, "Pass", "Fail")
# Print the results vector
# Your code here

Need a hint?

Use print(results) to show the vector on the screen.