sklearn.utils.extmath.safe_sparse_dot — scikit-learn 0.20.4 documentation (original) (raw)
sklearn.utils.extmath. safe_sparse_dot(a, b, dense_output=False)[source]¶
Dot product that handle the sparse matrix case correctly
Uses BLAS GEMM as replacement for numpy.dot where possible to avoid unnecessary copies.
| Parameters: | a : array or sparse matrix b : array or sparse matrix dense_output : boolean, default False When False, either a or b being sparse will yield sparse output. When True, output will always be an array. |
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| Returns: | dot_product : array or sparse matrix sparse if a or b is sparse and dense_output=False. |