Generate a correlation matrix with all off-diagonal values equal to r

Generate a correlation matrix with all off-diagonal values equal to r

Usage

cor_matrix(r, nrow = 2)

Arguments

r

The correlation to fill in the matrix off-diagonals

nrow

The number of rows (and columns) of the resulting matrix

Value

An [nrow x nrow] matrix with values along the diagonal equal to 1 and values off of the diagonal equal to r

Examples

cor_matrix(0, nrow = 3)
#>      [,1] [,2] [,3]
#> [1,]    1    0    0
#> [2,]    0    1    0
#> [3,]    0    0    1

cor_matrix(-.5, nrow = 4)
#>      [,1] [,2] [,3] [,4]
#> [1,]  1.0 -0.5 -0.5 -0.5
#> [2,] -0.5  1.0 -0.5 -0.5
#> [3,] -0.5 -0.5  1.0 -0.5
#> [4,] -0.5 -0.5 -0.5  1.0