Setting Diagonal of a Square Matrix to Zero

When matrix is of N x N i.e. same no of rows and same no of columns

Syntax :

matrix_1 <- matrix(sequence ,nrow)

• sequence: sequence of numbers
• nrow: number of rows

Output:

 [,1] [,2] [,3] [,4] [,5]
[1,]    1    6   11   16   21
[2,]    2    7   12   17   22
[3,]    3    8   13   18   23
[4,]    4    9   14   19   24
[5,]    5   10   15   20   25

Modified Matrix :

     [,1] [,2] [,3] [,4] [,5]
[1,]    0    6   11   16   21
[2,]    2    0   12   17   22
[3,]    3    8    0   18   23
[4,]    4    9   14    0   24
[5,]    5   10   15   20    0

We create a square matrix using matrix() with number of rows to be 4 and sequence being from 1-25. We use diag(matrix_1) <- 0, this function used to access the diagonal elements of matrix which is from top left to bottom right and returns a vector containing the diagonal elements of the matrix where all diagonal elements are zero.

Matrices are fundamental data structures in R that allow you to store and manipulate two-dimensional data. If you want to set diagonal element of matrix to zero in R programming language then you have to follow these steps to attain it.