Hi Sergio, In IsolationForest, BaseBagging is applied with ExtraTreeRegressor as base_estimator. Algorithm 2 (iTree) of the original paper is thus implemented in ExtaTreeRegressor.
The forest is implemented thanks to the bagging procedure. HTH, Albert On Sun 20 May 2018 at 09:56, Sergio Solórzano <sdsr.s...@gmail.com> wrote: > currently I am studying the "Isolation forest" algorithm proposed by > Liu, Ting and Zhou. I started reading the scikit-learn implementation > but could not find where exactly is the algorithm 2 of the original > paper implemented. > > So far this is what I managed to understand: In the iforest.py file > there is the “fit” method which, if my understanding is correct, > essentially makes a call to the “_fit” method of the BaseBagging class > but there I can’t see how the algorithm 2 of the original reference is > implemented. > > Any help on the details of how Itrees and Iforests are implemented is > appreciated. > > If this is not the right place to ask, please let me know where is it. > > Thanks for the time and help > Sergio S > _______________________________________________ > scikit-learn mailing list > scikit-learn@python.org > https://mail.python.org/mailman/listinfo/scikit-learn >
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