How to Reshape Matrices in R - Step by Step Examples

How to Reshape Matrices in R ?

Answer

In R, you can reshape matrices using functions like matrix(), array(), and dim(). These functions allow you to change the dimensions of a matrix or convert it to a different shape.

✐ Examples

1 Reshaping a Matrix into a Different Dimension

In this example,

We start with a matrix mat of dimensions 2x3, created using the matrix() function.
We use the dim() function to change the dimensions of mat to 3x2. This reshapes the matrix into a different dimension.
We print the reshaped matrix to the console to verify the change in dimensions.

R Program

mat <- matrix(1:6, nrow = 2, ncol = 3)
dim(mat) <- c(3, 2)
print(mat)

Output

     [,1] [,2]
[1,]    1    3
[2,]    2    4
[3,]    5    6

2 Converting a Matrix into an Array

In this example,

We start with a matrix mat of dimensions 2x3, created using the matrix() function.
We use the array() function to convert mat into a 3-dimensional array with dimensions 2x3x1.
We print the converted array to the console to verify the transformation.

R Program

mat <- matrix(1:6, nrow = 2, ncol = 3)
array_mat <- array(mat, dim = c(2, 3, 1))
print(array_mat)

Output

 , , 1

     [,1] [,2] [,3]
[1,]    1    3    5
[2,]    2    4    6

Summary

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

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How to Reshape Matrices in R - Step by Step Examples

How to Reshape Matrices in R ?

Answer

✐ Examples

1 Reshaping a Matrix into a Different Dimension

R Program

Output

2 Converting a Matrix into an Array

R Program

Output

Summary

More R Matrices Tutorials