sklearn.utils.extmath.safe_sparse_dot¶
- 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.
Returns: dot_product : array or sparse matrix
sparse if a or b is sparse and dense_output=False.