Slab lens

Create a lens into a chunk of an array (hyperslab). Uses the same syntactic rules as [.

slab_l(..., drop = FALSE)

Arguments

...	arguments as they would be passed to [ for example x[3,5,7].
drop	whether or not to drop dimensions with length 1. Only applies to view.

Examples

(x <- matrix(1:4, ncol = 2))
#>      [,1] [,2]
#> [1,]    1    3
#> [2,]    2    4
view(x, slab_l(2,)) # x[2,, drop = FALSE]
#>      [,1] [,2]
#> [1,]    2    4
view(x, slab_l(2, 2)) # x[2,2, drop = FALSE]
#>      [,1]
#> [1,]    4
set(x, slab_l(1,1:2), c(10,20))
#>      [,1] [,2]
#> [1,]   10   20
#> [2,]    2    4