scikit-learn/scikit-learn — pull request #2788 by Manoj-Kumar-S (2014-01-23 13:17:15+00:00)
Title: Fixing alpha_grid for sparse matrices

Fixes https://github.com/scikit-learn/scikit-learn/issues/2526 partially.

Centering of the sparse matrices is done indirectly. The correct output and marginally faster than in master, though still much slower then than dense matrices.