How to Create Identity Matrix in R

How to Create Identity Matrix in R ?

Answer

In R, you can create an identity matrix using the diag() function. This function creates a diagonal matrix with specified dimensions, where the diagonal elements are all 1s and off-diagonal elements are 0s.

✐ Examples

1 Creating a 3x3 Identity Matrix

In this example,

We use the diag() function to create a 3x3 identity matrix. The argument nrow specifies the number of rows in the matrix.
We assign the resulting identity matrix to a variable named identity_mat.
We print the identity_mat to the console to verify the creation of the identity matrix.

R Program

identity_mat <- diag(3)
print(identity_mat)

Output

     [,1] [,2] [,3]
[1,]    1    0    0
[2,]    0    1    0
[3,]    0    0    1

2 Creating a 4x4 Identity Matrix

In this example,

We use the diag() function to create a 4x4 identity matrix. The argument nrow specifies the number of rows in the matrix.
We assign the resulting identity matrix to a variable named identity_mat.
We print the identity_mat to the console to verify the creation of the identity matrix.

R Program

identity_mat <- diag(4)
print(identity_mat)

Output

     [,1] [,2] [,3] [,4]
[1,]    1    0    0    0
[2,]    0    1    0    0
[3,]    0    0    1    0
[4,]    0    0    0    1

Summary

In this tutorial, we learned How to Create Identity Matrix in R language with well detailed examples.

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How to Create Identity Matrix in R

How to Create Identity Matrix in R ?

Answer

✐ Examples

1 Creating a 3x3 Identity Matrix

R Program

Output

2 Creating a 4x4 Identity Matrix

R Program

Output

Summary

More R Matrices Tutorials