# Converting a List to Vector in R Language – unlist() Function

`unlist()` function in R Language is used to convert a list to vector. It simplifies to produce a vector by preserving all components.

Syntax: unlist(list)

Parameters:
list: It is a list or Vector
use.name: Boolean value to prserve or not the position names

Example 1: Converting list numeric vector into a single vector

 `# R  program to illustrate ` `# converting list to vector ` `  `  `# Creating a list. ` `my_list <``-` `list``(l1 ``=` `c(``1``, ``3``, ``5``, ``7``),                 ` `                ``l2 ``=` `c(``1``, ``2``, ``3``),                     ` `                ``l3 ``=` `c(``1``, ``1``, ``10``, ``5``, ``8``, ``65``, ``90``))    ` `  `  `# Apply unlist R function ` `print``(unlist(my_list))                                     `

Output:

```l11 l12 l13 l14 l21 l22 l23 l31 l32 l33 l34 l35 l36 l37
1   3   5   7   1   2   3   1   1  10   5   8  65  90
```

Here in the above code we have unlisted my_list using `unlist()` and convert it to a single vector.
As illustrated above, the list will dissolve and every element will be in the same line as shown above.

Example 2: Unlisting list with dataframe:

 `# R program to illustrate ` `# Unlisting list with data frame ` ` `  `# Creating a list. ` `my_list <``-` `list``(l1 ``=` `c(``1``, ``3``, ``5``, ``7``),                 ` `                ``l2 ``=` `c(``1``, ``2``, ``3``),                     ` `                ``l3 ``=` `c(``1``, ``1``, ``10``, ``5``, ``8``, ``65``, ``90``))    ` `  `  ` `  `# Create modified list ` `my_list_2 <``-` `my_list  ` ` `  `# Add a data frame to the list                               ` `my_list_2[[``4``]] <``-` `data.frame(x1 ``=` `c(``1``, ``2``, ``3``),        ` `                             ``x2 ``=` `c(``4``, ``5``, ``6``)) ` ` `  `# Unlist list with data.frame ` `print``(unlist(my_list_2, use.names ``=` `FALSE)) ` `                         `

Output:

```  1  3  5  7  1  2  3  1  1 10  5  8 65 90  1  2  3  4  5  6
```

Here in the above code we have modified the previous list and added new elements to “my_list_2” and used the function `unlist()` on it.
Also we set the “use.name” parameter to “FALSE” so we will not see the position names of the values in the vector.

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