Coerce sparse matrix to tibble with sparse columns

Turning a sparse matrix into a tibble.

coerce_to_sparse_tibble(x, call = rlang::caller_env(0))

Arguments

x

sparse matrix.

call

The execution environment of a currently running function, e.g. caller_env(). The function will be mentioned in error messages as the source of the error. See the call argument of abort() for more information.

Value

tibble with sparse columns

Details

The only requirement from the sparse matrix is that it contains column names.

See also

coerce_to_sparse_data_frame() coerce_to_sparse_matrix()

Examples

set.seed(1234)
mat <- matrix(sample(0:1, 100, TRUE, c(0.9, 0.1)), nrow = 10)
colnames(mat) <- letters[1:10]
sparse_mat <- Matrix::Matrix(mat, sparse = TRUE)
sparse_mat
#> 10 x 10 sparse Matrix of class "dgCMatrix"
#>   [[ suppressing 10 column names ‘a’, ‘b’, ‘c’ ... ]]
#>                          
#>  [1,] . . . . . . . . 1 .
#>  [2,] . . . . . . . . . 1
#>  [3,] . . . . . . . . . .
#>  [4,] . 1 . . . . . . . .
#>  [5,] . . . . . . . . . .
#>  [6,] . . . . . . . . . .
#>  [7,] . . . . . . . . . .
#>  [8,] . . 1 . . . . . . .
#>  [9,] . . . 1 . . . . . .
#> [10,] . . . . . . . . . .

res <- coerce_to_sparse_tibble(sparse_mat)
res
#> # A tibble: 10 × 10
#>        a     b     c     d     e     f     g     h     i     j
#>    <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl>
#>  1     0     0     0     0     0     0     0     0     1     0
#>  2     0     0     0     0     0     0     0     0     0     1
#>  3     0     0     0     0     0     0     0     0     0     0
#>  4     0     1     0     0     0     0     0     0     0     0
#>  5     0     0     0     0     0     0     0     0     0     0
#>  6     0     0     0     0     0     0     0     0     0     0
#>  7     0     0     0     0     0     0     0     0     0     0
#>  8     0     0     1     0     0     0     0     0     0     0
#>  9     0     0     0     1     0     0     0     0     0     0
#> 10     0     0     0     0     0     0     0     0     0     0

# All columns are sparse
vapply(res, is_sparse_vector, logical(1))
#>    a    b    c    d    e    f    g    h    i    j 
#> TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE TRUE