JSON with jsonlite in R Programming - Mini Project: Build & Apply

JSON with jsonlite

📖 Scenario: You are working with data in R and want to convert it to JSON format to share with others or save it in a file.

🎯 Goal: Learn how to create a simple data frame, convert it to JSON using the jsonlite package, and display the JSON output.

📋 What You'll Learn

Create a data frame with exact values

Load the jsonlite package

Convert the data frame to JSON format

Print the JSON output

💡 Why This Matters

🌍 Real World

Sharing data between R and web applications or APIs often requires JSON format.

💼 Career

Data analysts and scientists frequently convert data to JSON to integrate with other tools and services.

1

Create a data frame

Create a data frame called students with two columns: name and score. The data frame should have these exact rows: 'Alice', 58, 'Bob', 75, 'Charlie', 62.

R Programming

# Create the data frame called students with the exact data
# Your code here

Need a hint?

Use data.frame() with name and score vectors. Set stringsAsFactors = FALSE to keep names as strings.

2

Load the jsonlite package

Load the jsonlite package using the library() function.

R Programming

students <- data.frame(
  name = c("Alice", "Bob", "Charlie"),
  score = c(58, 75, 62),
  stringsAsFactors = FALSE
)
# Load the jsonlite package
# Your code here

Need a hint?

Use library(jsonlite) to load the package before using its functions.

3

Convert data frame to JSON

Use the toJSON() function from jsonlite to convert the students data frame to JSON format and save it in a variable called students_json. Use pretty = TRUE to format the JSON nicely.

R Programming

students <- data.frame(
  name = c("Alice", "Bob", "Charlie"),
  score = c(58, 75, 62),
  stringsAsFactors = FALSE
)
library(jsonlite)
# Convert students to JSON with pretty formatting
# Your code here

Need a hint?

Use students_json <- toJSON(students, pretty = TRUE) to convert and format the JSON.

4

Print the JSON output

Print the students_json variable to display the JSON string.

R Programming

students <- data.frame(
  name = c("Alice", "Bob", "Charlie"),
  score = c(58, 75, 62),
  stringsAsFactors = FALSE
)
library(jsonlite)
students_json <- toJSON(students, pretty = TRUE)
# Print the JSON output
# Your code here

Need a hint?

Use print(students_json) to show the JSON string in the console.