Generate identity matrix

stm_identity() creates an n x n identity matrix where all diagonal elements are 1, and all off-diagonal elements are 0.

Usage

stm_identity(n)

Arguments

n

A positive integer specifying the size of the identity matrix. It represents both the number of rows and columns.

Value

An n x n identity matrix.

Details

The identity matrix is a square matrix with ones on the diagonal and zeros elsewhere. It is used in various mathematical operations such as matrix inversion and solving systems of linear equations.

See also

diag, stm_eye

Examples

stm_identity(3)
#>      [,1] [,2] [,3]
#> [1,]    1    0    0
#> [2,]    0    1    0
#> [3,]    0    0    1
stm_identity(5)
#>      [,1] [,2] [,3] [,4] [,5]
#> [1,]    1    0    0    0    0
#> [2,]    0    1    0    0    0
#> [3,]    0    0    1    0    0
#> [4,]    0    0    0    1    0
#> [5,]    0    0    0    0    1