Usage
sparsity(x, sample = NULL)
Arguments
- x
a data frame, matrix of sparse matrix.
- sample
a integer or NULL. Number of rows to sample to estimate
sparsity. If NULL then no sampling is performed. Will not be used when
x is a sparse matrix. Defaults to NULL.
Value
a single number, between 0 and 1.
Details
Only numeric 0s are considered zeroes in this calculations. Missing values,
logical vectors and then string "0" aren't counted.
Examples
# data frame
sparsity(mtcars)
#> [1] 0.1051136
# Matrix
set.seed(1234)
mat <- matrix(sample(0:1, 100, TRUE, c(0.9, 0.1)), nrow = 10)
colnames(mat) <- letters[1:10]
sparsity(mat)
#> [1] 0.95
# Sparse matrix
sparse_mat <- Matrix::Matrix(mat, sparse = TRUE)
sparsity(sparse_mat)
#> [1] 0.95
