Perform the computations for thresholded Jaccard distance
jaccard_indicator_comp(gs, eps)A list with row and column indices in the #row x #row indicator
matrix specifying which rows in the original matrix had a distance
of at most eps.
a list of integer vectors, one for each row, giving the column
indices of the non-zero elements of the row or NULL if the
whole row is empty.
an upper bound on the Jaccard distance (1 - eps becomes a
lower bound on the Jaccard similarity)
This function is optimized for sparse matrices and computes the pairwise
Jaccard distances between the rows of the input matrix. Note that the
actual distance is not saved. Instead, a threshold (eps) is supplied
and an indicator matrix is returned, with a one indicating that the
distance is smaller than eps (equivalently, the Jaccard similarity
is larger than 1 - eps).