sparsevctrs (version 0.3.3)

has_sparse_elements: Check for sparse elements

Description

This function checks to see if a data.frame, tibble or list contains one or more sparse vectors.

Usage

has_sparse_elements(x)

Value

A single logical value.

Arguments

x

a data frame, tibble, or list.

Details

The checking in this function is done using is_sparse_vector(), but is implemented using an early exit pattern to provide fast performance for wide data.frames.

This function does not test whether x is a data.frame, tibble or list. It simply iterates over the elements and sees if they are sparse vectors.

Examples

set.seed(1234)
n_cols <- 10000
mat <- matrix(sample(0:1, n_cols * 10, TRUE, c(0.9, 0.1)), ncol = n_cols)
colnames(mat) <- as.character(seq_len(n_cols))
sparse_mat <- Matrix::Matrix(mat, sparse = TRUE)

res <- coerce_to_sparse_tibble(sparse_mat)
has_sparse_elements(res)

has_sparse_elements(mtcars)