Vector arithmetic (element-wise) in R Programming - Mini Project: Build & Apply

Vector arithmetic (element-wise)

📖 Scenario: You are working with two sets of numbers representing daily temperatures in two different cities. You want to compare them by adding, subtracting, multiplying, and dividing the temperatures element by element.

🎯 Goal: Build a simple R program that creates two numeric vectors, sets a length variable, performs element-wise arithmetic operations on the vectors, and prints the results.

📋 What You'll Learn

Create two numeric vectors named city1_temps and city2_temps with exact values

Create a variable n that stores the length of the vectors

Use element-wise arithmetic operations: addition, subtraction, multiplication, and division

Print the results of each arithmetic operation

💡 Why This Matters

🌍 Real World

Element-wise vector arithmetic is useful when comparing or combining data points from two related datasets, like temperatures from two cities over several days.

💼 Career

Data analysts and scientists often use vector operations to quickly process and analyze numerical data without writing loops.

1

Create two numeric vectors

Create a numeric vector called city1_temps with values c(20, 22, 19, 24, 21) and another numeric vector called city2_temps with values c(18, 21, 20, 23, 22).

R Programming

# Create the vectors city1_temps and city2_temps with the exact values
# Your code here

Need a hint?

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

2

Create a length variable

Create a variable called n that stores the length of the vector city1_temps using the length() function.

R Programming

city1_temps <- c(20, 22, 19, 24, 21)
city2_temps <- c(18, 21, 20, 23, 22)
# Create variable n to store the length of city1_temps
# Your code here

Need a hint?

Use length(city1_temps) to find how many elements are in the vector.

3

Perform element-wise arithmetic operations

Create four new vectors: sum_temps as the element-wise sum of city1_temps and city2_temps, diff_temps as the element-wise difference, prod_temps as the element-wise product, and quot_temps as the element-wise quotient.

R Programming

city1_temps <- c(20, 22, 19, 24, 21)
city2_temps <- c(18, 21, 20, 23, 22)
n <- length(city1_temps)
# Create sum_temps, diff_temps, prod_temps, and quot_temps using element-wise operations
# Your code here

Need a hint?

Use +, -, *, and / operators directly on the vectors for element-wise operations.

4

Print the results

Print the vectors sum_temps, diff_temps, prod_temps, and quot_temps each on a separate line using the print() function.

R Programming

city1_temps <- c(20, 22, 19, 24, 21)
city2_temps <- c(18, 21, 20, 23, 22)
n <- length(city1_temps)
sum_temps <- city1_temps + city2_temps
diff_temps <- city1_temps - city2_temps
prod_temps <- city1_temps * city2_temps
quot_temps <- city1_temps / city2_temps
# Print sum_temps, diff_temps, prod_temps, and quot_temps
# Your code here

Need a hint?

Use print() for each vector to see the results on separate lines.