Modifying and adding elements in R Programming - Mini Project: Build & Apply

Modifying and adding elements

📖 Scenario: You are managing a list of fruits in a basket. Sometimes you need to change a fruit or add a new one to keep the basket fresh and interesting.

🎯 Goal: You will create a vector of fruits, then modify one fruit's name, add a new fruit, and finally display the updated basket.

📋 What You'll Learn

Create a vector called basket with the fruits: "apple", "banana", "cherry"

Create a variable called replace_index and set it to 2

Replace the fruit at position replace_index in basket with "blueberry"

Add the fruit "date" to the end of basket

Print the updated basket vector

💡 Why This Matters

🌍 Real World

Managing lists of items like groceries, tasks, or favorites often requires changing or adding elements to keep the list current.

💼 Career

Knowing how to modify and add elements in data structures is essential for data cleaning, updating records, and managing collections in many programming jobs.

1

Create the initial fruit basket

Create a vector called basket with the fruits "apple", "banana", and "cherry".

R Programming

# Create a vector called basket with "apple", "banana", and "cherry"
basket <- c("apple", "banana", "cherry")

Need a hint?

Use the c() function to create a vector with the exact fruits.

2

Set the index to replace

Create a variable called replace_index and set it to 2.

R Programming

basket <- c("apple", "banana", "cherry")
# Create replace_index and set it to 2
replace_index <- 2

Need a hint?

Just assign the number 2 to the variable replace_index.

3

Modify the fruit at the given index

Replace the fruit at position replace_index in basket with "blueberry".

R Programming

basket <- c("apple", "banana", "cherry")
replace_index <- 2
# Replace the fruit at replace_index with "blueberry"
basket[replace_index] <- "blueberry"

Need a hint?

Use square brackets [] to access and change the element at replace_index.

4

Add a new fruit and print the basket

Add the fruit "date" to the end of basket and then print the updated basket vector.

R Programming

basket <- c("apple", "banana", "cherry")
replace_index <- 2
basket[replace_index] <- "blueberry"
# Add "date" to the end of basket
basket <- c(basket, "date")
# Print the basket
print(basket)

Need a hint?

Use c() to add "date" to the vector and print() to show the basket.