Indexing in Vectors | Basic Data Types and Vectors
R Introduction: Part I

# Indexing in Vectors

Great! Now you understand how to create a vector and assign names to its values.

To access specific elements within a vector, you can use indices. The index of the first element is `1`, the second element is `2`, and so on. To retrieve the `n`-th element from a vector `vec`, use the syntax `vec[n]`. Additionally, if the vector elements have assigned names, you can extract the values by their names by enclosing the name in quotes and square brackets.

Now, let’s revisit the grades example:

Math 80
Physics 75
English 95
Literature 100

We'll extract the grade for `Math` and the grade for `Literature`.

It's also possible to access multiple elements simultaneously:

Завдання

Continuing from the previous exercise, you have a vector named `prices` with each price assigned to a corresponding item name.

1. Retrieve the price of `'Armchair'` using its name rather than its index.
2. Retrieve the prices for both the `'Dining table'` and `'Dining chair'` using their indices.

Все було зрозуміло?

Секція 2. Розділ 7

Зміст курсу

R Introduction: Part I

# Indexing in Vectors

Great! Now you understand how to create a vector and assign names to its values.

To access specific elements within a vector, you can use indices. The index of the first element is `1`, the second element is `2`, and so on. To retrieve the `n`-th element from a vector `vec`, use the syntax `vec[n]`. Additionally, if the vector elements have assigned names, you can extract the values by their names by enclosing the name in quotes and square brackets.

Now, let’s revisit the grades example:

Math 80
Physics 75
English 95
Literature 100

We'll extract the grade for `Math` and the grade for `Literature`.

It's also possible to access multiple elements simultaneously:

Завдання

Continuing from the previous exercise, you have a vector named `prices` with each price assigned to a corresponding item name.

1. Retrieve the price of `'Armchair'` using its name rather than its index.
2. Retrieve the prices for both the `'Dining table'` and `'Dining chair'` using their indices.

Все було зрозуміло?

Секція 2. Розділ 7