Show the sparsity (as a count or proportion) of a matrix. For
example, .99 sparsity means 99% of the values are zero.
Similarly, a sparsity of 0 means the matrix is fully dense.
Usage
sparsity(x, proportion = TRUE)
Arguments
x
The matrix, stored as an ordinary R matrix or as a "simple
triplet matrix" (from the slam package).
proportion
Logical; should a proportion or a count be returned?
Value
The sparsity of the input matrix, as a proportion or a count.
Details
The implementation is very efficient for dense matrices. For
sparse triplet matrices, the count is trivial.