How to Convert Data Frames to Matrices in R - Step by Step Examples

How to Convert Data Frames to Matrices in R ?

Answer

In R, you can convert data frames to matrices using the as.matrix() function. This function transforms the data frame into a matrix by retaining the original data structure.

✐ Examples

1 Converting a Simple Data Frame to a Matrix

In this example,

We start with a simple data frame named df containing three columns: col1, col2, and col3.
We use the as.matrix() function to convert the data frame df into a matrix named mat.
We print the resulting matrix mat to the console to verify the conversion.

R Program

df <- data.frame(col1 = c(1, 2, 3), col2 = c(4, 5, 6), col3 = c(7, 8, 9))
mat <- as.matrix(df)
print(mat)

Output

     col1 col2 col3
[1,]    1    4    7
[2,]    2    5    8
[3,]    3    6    9

2 Converting a Data Frame with Factors to a Matrix

In this example,

We start with a data frame named df containing two columns: name and age. The age column is a factor.
We use the as.matrix() function to convert the data frame df into a matrix named mat.
We print the resulting matrix mat to the console to verify the conversion.

R Program

df <- data.frame(name = c('Alice', 'Bob', 'Charlie'), age = factor(c('Young', 'Middle', 'Old')))
mat <- as.matrix(df)
print(mat)

Output

     name     age  
[1,] "Alice" "Young"
[2,] "Bob"   "Middle"
[3,] "Charlie" "Old"

Summary

In this tutorial, we learned How to Convert Data Frames to Matrices in R language with well detailed examples.

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How to Convert Data Frames to Matrices in R - Step by Step Examples

How to Convert Data Frames to Matrices in R ?

Answer

✐ Examples

1 Converting a Simple Data Frame to a Matrix

R Program

Output

2 Converting a Data Frame with Factors to a Matrix

R Program

Output

Summary

More R Matrices Tutorials