Pipe chaining operations in R Programming - Mini Project: Build & Apply

Pipe chaining operations

📖 Scenario: You work in a small bakery and keep track of daily sales in a list. You want to find out which items sold more than 10 units and then get their names in uppercase to display on a special board.

🎯 Goal: Use pipe chaining operations to filter items with sales greater than 10 and convert their names to uppercase.

📋 What You'll Learn

Create a named vector called sales with exact entries: Bread = 15, Cookies = 8, Cake = 12, Pie = 5

Create a variable called threshold and set it to 10

Use pipe chaining with %>% to filter sales for items with sales greater than threshold and then convert the item names to uppercase

Print the final result

💡 Why This Matters

🌍 Real World

Filtering and transforming sales data helps businesses quickly identify top-selling products and display them clearly for customers or staff.

💼 Career

Data analysts and business intelligence professionals often use pipe chaining in R to write clean, readable code for data filtering and transformation.

1

Create the sales data

Create a named vector called sales with these exact entries: Bread = 15, Cookies = 8, Cake = 12, Pie = 5

R Programming

# Create the sales vector with exact names and values
# Your code here

Need a hint?

Use c() to create a named vector with names and values separated by =.

2

Set the sales threshold

Create a variable called threshold and set it to 10

R Programming

sales <- c(Bread = 15, Cookies = 8, Cake = 12, Pie = 5)
# Create the threshold variable and set it to 10
# Your code here

Need a hint?

Just assign the number 10 to the variable threshold.

3

Filter and transform with pipe chaining

Use pipe chaining with %>% to filter sales for items with sales greater than threshold and then convert the item names to uppercase. Store the result in a variable called top_items. Use magrittr::extract() or base R to filter and names() with toupper() to convert names.

R Programming

sales  threshold and convert names to uppercase
# Store result in top_items
# Your code here

Need a hint?

Use %>% to chain filtering and renaming. Filtering keeps sales above threshold. Then change names to uppercase with toupper().

4

Print the final result

Write print(top_items) to display the filtered and renamed sales vector.

R Programming

library(magrittr)
top_items %
  magrittr::extract(. > threshold) %>%
  { names(.) <- toupper(names(.)); . }

# Print the top_items vector
# Your code here

Need a hint?

Use print(top_items) to show the final filtered and renamed vector.