# Convert a Data Frame into a Numeric Matrix in R Programming – data.matrix() Function

`data.matrix()` function in R Language is used to create a matrix by converting all the values of a Data Frame into numeric mode and then binding them as a matrix.

Syntax: data.matrix(df)

Parameters:
df: Data frame to be converted.

Example 1:

 `# R program to convert a data frame ` `# into a numeric matrix ` `   `  `# Creating a dataframe  ` `df1 ``=` `data.frame(  ` `  ``"Name"` `=` `c(``"Amar"``, ``"Akbar"``, ``"Ronald"``),  ` `  ``"Language"` `=` `c(``"R"``, ``"Python"``, ``"C#"``),  ` `  ``"Age"` `=` `c(``26``, ``38``, ``22``)  ` `)  ` ` `  `# Printing data frame ` `print``(df1) ` ` `  `# Converting into numeric matrix ` `df2 <``-` `data.matrix(df1) ` `df2 `

Output:

```    Name Language Age
1   Amar        R  26
2  Akbar   Python  38
3 Ronald       C#  22
Name Language Age
[1, ]    2        3  26
[2, ]    1        2  38
[3, ]    3        1  22
```

Example 2:

 `# R program to convert a data frame ` `# into a numeric matrix ` `   `  `# Creating a dataframe  ` `df <``-` `data.frame(sample(LETTERS[``1``:``4``], ``8``,  ` `                 ``replace ``=` `T), cbind(``1``:``4``, ``1``:``8``)) ` `colnames(df) <``-` `c(``"x"``, ``"y"``, ``"z"``) ` ` `  `# Printing data frame ` `print``(df) ` ` `  `# Converting into numeric matrix ` `df2 <``-` `data.matrix(df) ` `df2 `

Output:

```  x y z
1 A 1 1
2 D 2 2
3 C 3 3
4 A 4 4
5 B 1 5
6 B 2 6
7 A 3 7
8 C 4 8
x y z
[1, ] 1 1 1
[2, ] 4 2 2
[3, ] 3 3 3
[4, ] 1 4 4
[5, ] 2 1 5
[6, ] 2 2 6
[7, ] 1 3 7
[8, ] 3 4 8
```

My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.

Article Tags :

Be the First to upvote.

Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.