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[MRG+1] DOC FIX: update warning about random seed with scipy #7577

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Oct 5, 2016
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[MRG+1] DOC FIX: update warning about random seed with scipy #7577

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9 changes: 6 additions & 3 deletions doc/modules/grid_search.rst
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Expand Up @@ -113,9 +113,12 @@ consecutive calls.

.. warning::

The distributions in ``scipy.stats`` do not allow specifying a random
state. Instead, they use the global numpy random state, that can be seeded
via ``np.random.seed`` or set using ``np.random.set_state``.
The distributions in ``scipy.stats`` prior to version scipy 0.16
do not allow specifying a random state. Instead, they use the global
numpy random state, that can be seeded via ``np.random.seed`` or set
using ``np.random.set_state``. However, beginning scikit-learn 0.18,
the :mod:`sklearn.model_selection` module sets the random state provided
by the user if scipy >= 0.16 is also available.

For continuous parameters, such as ``C`` above, it is important to specify
a continuous distribution to take full advantage of the randomization. This way,
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