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Learn Operations with Vectors | Data Types and Vectors
R Introduction

bookOperations with Vectors

Vectors in R support arithmetic operations. Operations can be performed element by element between two vectors of the same length, or between a vector and a single number (applied to each element).

Element-wise Operations

Vectors of equal length can be combined with arithmetic operators, computing results element by element.

Example

123456
a <- c(10, 20, 30) b <- c(40, 25, 5) # Addition (element by element) c <- a + b c
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Scalar Operations

A single number can be combined with a vector, and the operation is applied to every element.

Example

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a <- c(10, 20, 30) b <- c(40, 25, 5) c <- a + b # Multiply each element by 2 d <- c * 2 d
copy

Aggregate Functions

R also has many functions, such as sum() and mean(), that work directly on vectors.

Example

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a <- c(10, 20, 30) b <- c(40, 25, 5) c <- a + b d <- c * 2 # Calculate the sum sum(d) # Calculate the average mean(d)
copy
Task

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You work at a store. During the day, you were able to sell the following items:

ItemPriceItems sold
Sofa$3405
Armchair$1507
Dining table$1153
Dining chair$4515
Bookshelf$1608

Your task is to:

  1. Construct a vector called sold with the respective values from the Items sold column.
  2. Calculate the revenue by multiplying the prices and sold vectors.
  3. Display the total sum of the revenue vector.

Solution

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SectionΒ 2. ChapterΒ 10
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bookOperations with Vectors

Swipe to show menu

Vectors in R support arithmetic operations. Operations can be performed element by element between two vectors of the same length, or between a vector and a single number (applied to each element).

Element-wise Operations

Vectors of equal length can be combined with arithmetic operators, computing results element by element.

Example

123456
a <- c(10, 20, 30) b <- c(40, 25, 5) # Addition (element by element) c <- a + b c
copy

Scalar Operations

A single number can be combined with a vector, and the operation is applied to every element.

Example

1234567
a <- c(10, 20, 30) b <- c(40, 25, 5) c <- a + b # Multiply each element by 2 d <- c * 2 d
copy

Aggregate Functions

R also has many functions, such as sum() and mean(), that work directly on vectors.

Example

123456789
a <- c(10, 20, 30) b <- c(40, 25, 5) c <- a + b d <- c * 2 # Calculate the sum sum(d) # Calculate the average mean(d)
copy
Task

Swipe to start coding

You work at a store. During the day, you were able to sell the following items:

ItemPriceItems sold
Sofa$3405
Armchair$1507
Dining table$1153
Dining chair$4515
Bookshelf$1608

Your task is to:

  1. Construct a vector called sold with the respective values from the Items sold column.
  2. Calculate the revenue by multiplying the prices and sold vectors.
  3. Display the total sum of the revenue vector.

Solution

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Everything was clear?

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SectionΒ 2. ChapterΒ 10
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