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sparsity() has been added, allows sparsity
calculations of data.frames, matrices, and sparse matrices.
(#82)
Utility function has_sparse_elements() has been
added. (#70)
Helper function sparse_dummy() has beenn added.
(#49)
Helper functions sparse_mean(),
sparse_var(), sparse_sd(),
sparse_median() has been added. (#49)
All sparse vector types now have a significant smaller base object size. (#67)
All coerce functions have received a call argument.
(#72)
is_sparse_vector() has been rewritten for speed
improvement. (#76)
coerce_to_sparse_matrix() Now turns dense zeroes
into sparse zeroes. (#77)
Fixed bug where coerce_to_sparse_data_frame() and
coerce_to_sparse_tibble() didn’t work with matrices with
fully sparse columns. (#69)
Fixed bugs where coerce_to_sparse_matrix() would
error for completely sparse columns. (#77)
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