Get available marix indices

Get available marix indices

matrix_idx(mat, n.row = NULL, n.col = NULL, mask = NULL)

Arguments

mat	matrix
n.row	number of rows; default: NULL
n.col	number of columns; default: NULL
mask	logical matrix; default: NULL

Examples

T <- TRUE; F <- FALSE
mat <- matrix(0, 3, 3)
mask <- m(T, T, F | T, F, T | F, F, T)
# All poss
matrix_idx(mat)
#> [[1]]
#> [1] 1 1
#> 
#> [[2]]
#> [1] 2 1
#> 
#> [[3]]
#> [1] 3 1
#> 
#> [[4]]
#> [1] 1 2
#> 
#> [[5]]
#> [1] 2 2
#> 
#> [[6]]
#> [1] 3 2
#> 
#> [[7]]
#> [1] 1 3
#> 
#> [[8]]
#> [1] 2 3
#> 
#> [[9]]
#> [1] 3 3
#> 
matrix_idx(mat, mask = mask)
#> [[1]]
#> [1] 1 1
#> 
#> [[2]]
#> [1] 2 1
#> 
#> [[3]]
#> [1] 1 2
#> 
#> [[4]]
#> [1] 2 3
#> 
#> [[5]]
#> [1] 3 3
#> 
matrix_idx(mask = mask)
#> [[1]]
#> [1] 1 1
#> 
#> [[2]]
#> [1] 2 1
#> 
#> [[3]]
#> [1] 1 2
#> 
#> [[4]]
#> [1] 2 3
#> 
#> [[5]]
#> [1] 3 3
#>