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Eliminates an zeros in a sparse matrix.
cleanup(x, eps = .Spam$eps)a sparse matrix of class spam.
numeric scalar > 0. Smaller entries are coerced to zero.
A sparse matrix may still contain zeros. This function (aliased
to as.spam) filters these values.
This often causes confusion when testing such matrices for symmetry
or comparing apparently equal matrices with all.equal
(see ‘Examples’ below.
A <- diag.spam(2)
A[1,2] <- 0
all.equal(A, t(A))
isSymmetric.spam(A)
all.equal(cleanup(A), diag.spam(2))
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