Given a matrix, create a list, each element of which contains a column or row from the matrix.

## Value

`matrix_to_list_of_cols()`

A list of vectors, each of which is a column from`x`

.`matrix_to_list_of_rows()`

, A list of vectors, each of which is a row from`x`

.

## Details

`matrix_to_list_of_cols()`

and `matrix_to_list_of_rows() are
internal functions, for use by developers, and would not
normally be called directly by end users.

## Examples

```
m <- matrix(1:12, nrow = 3)
matrix_to_list_of_cols(m)
#> [[1]]
#> [1] 1 2 3
#>
#> [[2]]
#> [1] 4 5 6
#>
#> [[3]]
#> [1] 7 8 9
#>
#> [[4]]
#> [1] 10 11 12
#>
matrix_to_list_of_rows(m)
#> [[1]]
#> [1] 1 4 7 10
#>
#> [[2]]
#> [1] 2 5 8 11
#>
#> [[3]]
#> [1] 3 6 9 12
#>
```