DOC clarify random_state docstring for fetch_kddcup99
@@ -140,7 +140,9 @@ def fetch_kddcup99(subset=None, data_home=None, shuffle=False,
Whether to shuffle dataset.
random_state : int, RandomState instance or None, optional (default=None)
- Random state for shuffling the dataset.
+ Random state for shuffling the dataset. If subset='SA', this random
+ state is also used to randomly select the small proportion of abnormal
+ samples.
If int, random_state is the seed used by the random number generator;
If RandomState instance, random_state is the random number generator;
If None, the random number generator is the RandomState instance used
