Takes a numeric vector, integer or double, and turn it into a sparse double vector.
Usage
as_sparse_double(x, default = 0)
as_sparse_integer(x, default = 0L)
as_sparse_character(x, default = "")
as_sparse_logical(x, default = FALSE)
Examples
x_dense <- c(3, 0, 2, 0, 0, 0, 4, 0, 0, 0)
x_sparse <- as_sparse_double(x_dense)
x_sparse
#> [1] 3 0 2 0 0 0 4 0 0 0
is_sparse_double(x_sparse)
#> [1] TRUE