Lens into lower diagonal elements

Create a lens into the lower diagonal elements of a matrix

lower_tri_l(diag = FALSE)

Arguments

diag	whether or not to include the diagonal

Examples

(x <- matrix(1:9, ncol = 3))
#>      [,1] [,2] [,3]
#> [1,]    1    4    7
#> [2,]    2    5    8
#> [3,]    3    6    9
view(x, lower_tri_l())
#> [1] 2 3 6
view(x, lower_tri_l(diag = TRUE))
#> [1] 1 2 3 5 6 9
set(x, lower_tri_l(), c(100, 200, 300))
#>      [,1] [,2] [,3]
#> [1,]    1    4    7
#> [2,]  100    5    8
#> [3,]  200  300    9