Sandeep Narayanaswami created SYSTEMML-1371:
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Summary: The "sparsity" parameter for the "rand" function is
confusingly named
Key: SYSTEMML-1371
URL: https://issues.apache.org/jira/browse/SYSTEMML-1371
Project: SystemML
Issue Type: Bug
Reporter: Sandeep Narayanaswami
Priority: Minor
Current definition: "sparsity: fraction of non-zero cells."
IMO, this would be more appropriately termed the "density": I'd expect that
setting sparsity=0 (equivalently density=1) returns a fully dense matrix.
(Setting sparsity=0 currently throws an error.)
The current definition is at odds with how scipy
(https://docs.scipy.org/doc/scipy-0.14.0/reference/generated/scipy.sparse.rand.html)
and R's Matrix package
(https://stat.ethz.ch/R-manual/R-devel/library/Matrix/html/rsparsematrix.html)
handle their sparse matrices.
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