readRDS and saveRDS in R Programming - Mini Project: Build & Apply

Using readRDS and saveRDS in R

📖 Scenario: You are working with R data objects and want to save them to a file and then read them back later. This is useful when you want to keep your data safe and load it quickly without recreating it every time.

🎯 Goal: Learn how to save an R object to a file using saveRDS() and then load it back using readRDS().

📋 What You'll Learn

Create a simple R object (a vector) with exact values

Save the object to a file using saveRDS()

Read the object back from the file using readRDS()

Print the loaded object to see the result

💡 Why This Matters

🌍 Real World

Saving and loading R objects is common when working with data analysis projects to avoid repeating expensive computations.

💼 Career

Data scientists and analysts often save intermediate results using <code>saveRDS()</code> and load them later to continue their work efficiently.

1

Create a vector called numbers with values 10, 20, 30, 40, 50

Create a vector called numbers with the exact values 10, 20, 30, 40, 50 using the c() function.

R Programming

# Create the vector numbers with values 10, 20, 30, 40, 50
# Your code here

Need a hint?

Use c(10, 20, 30, 40, 50) to create the vector and assign it to numbers.

2

Save the numbers vector to a file called numbers.rds using saveRDS()

Use saveRDS() to save the numbers vector to a file named "numbers.rds".

R Programming

numbers <- c(10, 20, 30, 40, 50)
# Save the numbers vector to 'numbers.rds'
# Your code here

Need a hint?

Call saveRDS(numbers, "numbers.rds") to save the vector.

3

Read the vector back from the file numbers.rds into a variable called loaded_numbers using readRDS()

Use readRDS() to read the data from the file "numbers.rds" and assign it to a variable called loaded_numbers.

R Programming

numbers <- c(10, 20, 30, 40, 50)
saveRDS(numbers, "numbers.rds")
# Read the data back into loaded_numbers
# Your code here

Need a hint?

Use loaded_numbers <- readRDS("numbers.rds") to load the saved vector.

4

Print the loaded_numbers vector to see the output

Write a print() statement to display the contents of loaded_numbers.

R Programming

numbers <- c(10, 20, 30, 40, 50)
saveRDS(numbers, "numbers.rds")
loaded_numbers <- readRDS("numbers.rds")
# Print loaded_numbers
# Your code here

Need a hint?

Use print(loaded_numbers) to show the vector.