Course Content

R Introduction: Part I

R Introduction: Part I

Operations with Vectors

Vectors in R offer a significant advantage due to their flexibility with various operations. For instance, if you have two vectors of the same length, you can easily perform addition or subtraction on an element-by-element basis. Additionally, vectors can undergo arithmetic operations with single numbers, which applies the operation to each element of the vector. For example, let's create a vector with the numbers `10, 20, 30` and add `40, 25, 5` to each corresponding element.

Now, let's go ahead and multiply each element by 2.

R also provides a variety of aggregate and statistical functions. Let's explore two of the most common ones:

• `sum()` - calculates and returns the sum of all vector elements.
• `mean()` - computes and returns the average value of the vector elements. We will proceed with our previous example and calculate the sum.

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 and then output the result.
3. Display the total sum of the `revenue` vector.