Named vectors in R Programming - Mini Project: Build & Apply

Named vectors

📖 Scenario: Imagine you are organizing a small fruit basket. You want to keep track of the number of each fruit you have, and give each count a name so you can easily find it later.

🎯 Goal: You will create a named vector in R where each fruit name is linked to its quantity. Then, you will access and display this information.

📋 What You'll Learn

Create a numeric vector with exact quantities for fruits

Assign names to each element in the vector matching the fruit names

Access the vector elements by their names

Print the named vector to show the fruit quantities

💡 Why This Matters

🌍 Real World

Named vectors help you label data clearly, like keeping track of items in a basket or inventory.

💼 Career

Understanding named vectors is useful in data analysis and programming jobs where you work with labeled data.

1

Create a numeric vector with fruit quantities

Create a numeric vector called fruit_counts with these exact values: 5, 3, 7, 2.

R Programming

# Create a numeric vector called fruit_counts with values 5, 3, 7, 2
# Your code here

Need a hint?

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

2

Assign names to the vector elements

Assign names "apple", "banana", "orange", and "pear" to the elements of the fruit_counts vector using the names() function.

R Programming

fruit_counts <- c(5, 3, 7, 2)
# Assign names to fruit_counts vector elements
# Your code here

Need a hint?

Use names(fruit_counts) <- c(...) to assign names.

3

Access elements by their names

Create a new variable called apple_count and assign it the value of the fruit_counts element named "apple".

R Programming

fruit_counts <- c(5, 3, 7, 2)
names(fruit_counts) <- c("apple", "banana", "orange", "pear")
# Assign the value of fruit_counts["apple"] to apple_count
# Your code here

Need a hint?

Use fruit_counts["apple"] to get the value for apple.

4

Print the named vector

Print the fruit_counts vector to display the fruit names and their quantities.

R Programming

fruit_counts <- c(5, 3, 7, 2)
names(fruit_counts) <- c("apple", "banana", "orange", "pear")
apple_count <- fruit_counts["apple"]
# Print the fruit_counts vector
# Your code here

Need a hint?

Use print(fruit_counts) to show the named vector.