Data frame creation in R Programming - Mini Project: Build & Apply

Data frame creation

📖 Scenario: You are working as a data analyst and need to organize some survey data into a table format for easy analysis.

🎯 Goal: Create a data frame in R with specific columns and data, then display it.

📋 What You'll Learn

Create a data frame with exact column names and values

Add a variable for the number of rows

Use the data.frame() function to create the data frame

Print the data frame to show the result

💡 Why This Matters

🌍 Real World

Data frames are used to organize and analyze data collected from surveys, experiments, or business records.

💼 Career

Knowing how to create and manipulate data frames is essential for data analysts, statisticians, and anyone working with data in R.

1

Create vectors for survey data

Create three vectors called names, ages, and cities with these exact values: names = c("Alice", "Bob", "Charlie"), ages = c(25, 30, 35), cities = c("New York", "Los Angeles", "Chicago")

R Programming

# Create vectors for names, ages, and cities
# Your code here

Need a hint?

Use the c() function to create vectors with the exact values given.

2

Create a variable for number of rows

Create a variable called num_rows that stores the number of elements in the names vector using the length() function

R Programming

names <- c("Alice", "Bob", "Charlie")
ages <- c(25, 30, 35)
cities <- c("New York", "Los Angeles", "Chicago")
# Create num_rows variable with length of names vector
# Your code here

Need a hint?

Use length(names) to find how many names are in the vector.

3

Create the data frame

Create a data frame called survey_data using the data.frame() function with columns Name, Age, and City using the vectors names, ages, and cities respectively

R Programming

names <- c("Alice", "Bob", "Charlie")
ages <- c(25, 30, 35)
cities <- c("New York", "Los Angeles", "Chicago")
num_rows <- length(names)
# Create data frame survey_data with columns Name, Age, City
# Your code here

Need a hint?

Use data.frame(Name = names, Age = ages, City = cities) to create the data frame with correct column names.

4

Print the data frame

Use print() to display the survey_data data frame

R Programming

names <- c("Alice", "Bob", "Charlie")
ages <- c(25, 30, 35)
cities <- c("New York", "Los Angeles", "Chicago")
num_rows <- length(names)
survey_data <- data.frame(Name = names, Age = ages, City = cities, stringsAsFactors = FALSE)
# Print the survey_data data frame
# Your code here

Need a hint?

Use print(survey_data) to show the data frame in the console.