[Numpy-discussion] Deprecate matrices in 1.15 and remove in 1.17?

[Gael Varoquaux]

> - There are major projects like scikit-learn that simply have no
> alternative to using np.matrix, because of scipy.sparse.

Well, we have no love for np.matrix, we just use scipy.sparse and
np.ndarray.

> - After there's an alternative to scipy.sparse:

+1 for alternative to scipy.sparse before transition.

Gaël