# R Vectors

## Vectors

A vector is simply a list of items that are of the same type.

To combine the list of items to a vector, use the `c()`

function and separate the items by a comma.

In the example below, we create a vector variable called **fruits**,
that combine strings:

### Example

```
# Vector of strings
```

fruits <- c("banana", "apple", "orange")

# Print fruits

fruits

Try it Yourself »
In this example, we create a vector that combines numerical values:

To create a vector with numerical values in a sequence, use the `:`

operator:

You can also create numerical values with decimals in a sequence, but note that if the last element does not belong to the sequence, it is not used:

### Example

```
# Vector with numerical
decimals in a sequence
```

numbers1 <-
1.5:6.5

numbers1

# Vector with numerical
decimals in a sequence where the last element is not used

numbers2 <-
1.5:6.3

numbers2

Result:

```
[1] 1.5 2.5 3.5 4.5 5.5 6.5
```

[1] 1.5 2.5 3.5 4.5 5.5

In the example below, we create a vector of logical values:

### Example

```
# Vector of logical values
```

log_values <-
c(TRUE, FALSE, TRUE, FALSE)

log_values

Try it Yourself »
## Vector Length

To find out how many items a vector has, use the `length()`

function:

## Sort a Vector

To sort items in a vector alphabetically or numerically, use the `sort()`

function:

### Example

```
fruits <- c("banana", "apple", "orange", "mango", "lemon")
```

numbers <- c(13, 3, 5, 7, 20, 2)

sort(fruits)
# Sort a string

sort(numbers) # Sort numbers

Try it Yourself »
## Access Vectors

You can access the vector items by referring to its index number inside brackets `[]`

. The first item has index 1, the second item has index 2, and so on:

### Example

```
fruits <- c("banana", "apple", "orange")
```

# Access the first item (banana)

fruits[1]

Try it Yourself »
You can also access multiple elements by referring to different index
positions with the `c()`

function:

### Example

```
fruits <- c("banana", "apple", "orange",
"mango", "lemon")
```

# Access the first and third item
(banana and orange)

fruits[c(1, 3)]

Try it Yourself »
You can also use negative index numbers to access all items except the ones specified:

### Example

```
fruits <- c("banana", "apple", "orange", "mango", "lemon")
```

# Access all
items except for the first item

fruits[c(-1)]

Try it Yourself »
## Change an Item

To change the value of a specific item, refer to the index number:

### Example

```
fruits <- c("banana", "apple", "orange", "mango", "lemon")
```

# Change
"banana" to "pear"

fruits[1] <- "pear"

# Print fruits

fruits

Try it Yourself »
## Repeat Vectors

To repeat vectors, use the `rep()`

function:

### Example

Repeat the sequence of the vector:

```
repeat_times <- rep(c(1,2,3), times = 3)
```

repeat_times

Try it Yourself »
### Example

Repeat each value independently:

```
repeat_indepent <- rep(c(1,2,3), times = c(5,2,1))
```

repeat_indepent

Try it Yourself »
## Generating Sequenced Vectors

One of the examples on top, showed you how to create a vector with numerical values in a sequence with the `:`

operator:

To make bigger or smaller steps in a sequence, use the `seq()`

function:

**Note:** The `seq()`

function has three parameters: `from`

is where the sequence starts, `to`

is where the sequence stops, and `by`

is the interval of the
sequence.