# How to Convert R List to Vector

R List is an inbuilt data structure containing various data types like vectors, strings, numbers, and another list. The list can be created using the list() function in R.

R Vector is an inbuilt data structure that contains elements of the same type. The same data type can be strings, numbers, vectors, or complex.

## How to Create List in R

To create a list in R, use the list() function. A list is a generic vector containing other objects. To check the data type of any variable in R language, use the typeof() function.

``````app_list <- list(
s1 = c(1, 3, 8),
s2 = c(2, 4, 6),
s3 = c(11, 21, 19))``````

#### Output

``````\$s1
 1 3 8

\$s2
 2 4 6

\$s3
 11 21 19``````

## How to Create Vector in R

To create a vector in R, use the c() function. If you try to define a vector with different data types, the c() function will try and coerce elements to the same type.

``````rv <- c(11, 19, 21, 18, 46)
rv``````

#### Output

`` 11 19 21 18 46``

## Convert R List to Vector

To convert List to Vector in R, use the unlist() function. The unlist() function simplifies to produce a vector by preserving all atomic components.

### Syntax

``unlist(x, recursive = TRUE, use.names = TRUE)``

### Arguments

#### list

The unlist() function takes a list as a required parameter, which then will be converted into the vector.

#### recursive

This is an optional argument that is logical and only accepts TRUE or FALSE.

#### use.names

This is an optional argument that is logical and accepts TRUE or FALSE.

### Example of conversion: List to Vector in R

Define a list using the list() function.

``````app_list <- list(1, 2, 3, 4)
app_list``````

#### Output

``````[]
 1

[]
 2

[]
 3

[]
 4``````

To convert list to vector, apply the unlist() function.

``````app_list <- list(1, 2, 3, 4)
app_list
cat("After converting list to vector", "\n")
unlist(app_list)``````

#### Output

``````[]
 1

[]
 2

[]
 3

[]
 4

After converting list to vector

 1 2 3 4``````

Here, you can see that we got the vector from the list.

## Converting list numeric vector into a single vector

Define a numeric list vector and then convert it into a single vector.

``````app_list <- list(
s1 = c(1, 3, 8),
s2 = c(2, 4, 6),
s3 = c(11, 21, 19))

app_list

cat("After converting list to vector", "\n")
unlist(app_list)``````

#### Output

``````\$s1
 1 3 8

\$s2
 2 4 6

\$s3
 11 21 19

After converting list to vector

s11 s12 s13 s21 s22 s23 s31 s32 s33
1   3   8   2   4   6   11  21 19``````

You can see that the unlist() function converts it to a single vector.

## Conclusion

Converting one data type to another is the common operation in R programming. If you want to convert the list to vector, then use the unlist() function. That is it for this tutorial.