cormat_from_triangle
makes a correlation matrix from a vector of the upper right triangle
Examples
cormat_from_triangle(c(.2, .3, .4,
.5, .6,
.7))
#> [,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