Operations 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
123456a <- c(10, 20, 30) b <- c(40, 25, 5) # Addition (element by element) c <- a + b c
Scalar Operations
A single number can be combined with a vector, and the operation is applied to every element.
Example
1234567a <- c(10, 20, 30) b <- c(40, 25, 5) c <- a + b # Multiply each element by 2 d <- c * 2 d
Aggregate Functions
R also has many functions, such as sum() and mean(), that work directly on vectors.
Example
123456789a <- 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)
Swipe to start coding
You work at a store. During the day, you were able to sell the following items:
| Item | Price | Items sold |
|---|---|---|
| Sofa | $340 | 5 |
| Armchair | $150 | 7 |
| Dining table | $115 | 3 |
| Dining chair | $45 | 15 |
| Bookshelf | $160 | 8 |
Your task is to:
- Construct a vector called
soldwith the respective values from the Items sold column. - Calculate the
revenueby multiplying thepricesandsoldvectors. - Display the total sum of the
revenuevector.
Рішення
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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
123456a <- c(10, 20, 30) b <- c(40, 25, 5) # Addition (element by element) c <- a + b c
Scalar Operations
A single number can be combined with a vector, and the operation is applied to every element.
Example
1234567a <- c(10, 20, 30) b <- c(40, 25, 5) c <- a + b # Multiply each element by 2 d <- c * 2 d
Aggregate Functions
R also has many functions, such as sum() and mean(), that work directly on vectors.
Example
123456789a <- 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)
Swipe to start coding
You work at a store. During the day, you were able to sell the following items:
| Item | Price | Items sold |
|---|---|---|
| Sofa | $340 | 5 |
| Armchair | $150 | 7 |
| Dining table | $115 | 3 |
| Dining chair | $45 | 15 |
| Bookshelf | $160 | 8 |
Your task is to:
- Construct a vector called
soldwith the respective values from the Items sold column. - Calculate the
revenueby multiplying thepricesandsoldvectors. - Display the total sum of the
revenuevector.
Рішення
Перейдіть на комп'ютер для реальної практикиПродовжуйте з того місця, де ви зупинились, використовуючи один з наведених нижче варіантівДякуємо за ваш відгук!
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