Make a correlation matrix

cormat makes a correlation matrix from a single number, vars\*vars matrix, vars\*vars vector, or a vars\*(vars-1)/2 vector.

cormat(cors = 0, vars = 3)

Arguments

cors

the correlations among the variables (can be a single number, vars\*vars matrix, vars\*vars vector, or a vars\*(vars-1)/2 vector)

vars

the number of variables in the matrix

Value

matrix

Examples

cormat(.5, 3)
#>      [,1] [,2] [,3]
#> [1,]  1.0  0.5  0.5
#> [2,]  0.5  1.0  0.5
#> [3,]  0.5  0.5  1.0
cormat(c( 1, .2, .3, .4,
         .2,  1, .5, .6, 
         .3, .5,  1, .7,
         .4, .6, .7,  1), 4)
#>      [,1] [,2] [,3] [,4]
#> [1,]  1.0  0.2  0.3  0.4
#> [2,]  0.2  1.0  0.5  0.6
#> [3,]  0.3  0.5  1.0  0.7
#> [4,]  0.4  0.6  0.7  1.0
cormat(c(.2, .3, .4, .5, .6, .7), 4)
#>      [,1] [,2] [,3] [,4]
#> [1,]  1.0  0.2  0.3  0.4
#> [2,]  0.2  1.0  0.5  0.6
#> [3,]  0.3  0.5  1.0  0.7
#> [4,]  0.4  0.6  0.7  1.0