I’d say the probably best summary (and discussion) can be found "Understanding variable importances in forests of randomized trees” by Gilles Louppe, Louis Wehenkel, Antonio Sutera and Pierre Geurts (with references to Breimans original proposed ideas) http://papers.nips.cc/paper/4928-understanding-variable-importances-in-forests-of-randomized-trees.pdf
Best, Sebastian > On May 16, 2016, at 5:49 PM, Gavin Gray <s0805...@sms.ed.ac.uk> wrote: > > In the Scikit-Learn documentation the feature importances are described as > coming from the relative depths features are used as decision nodes, averaged > across trees in the forest. Does anyone know which paper discusses this > method? Breiman's original paper seems to just talk about randomly permuting > the values of each variable and observing the change in the objective > function. > > Thanks, > -Gavin > The University of Edinburgh is a charitable body, registered in > Scotland, with registration number SC005336. > ------------------------------------------------------------------------------ > Mobile security can be enabling, not merely restricting. Employees who > bring their own devices (BYOD) to work are irked by the imposition of MDM > restrictions. Mobile Device Manager Plus allows you to control only the > apps on BYO-devices by containerizing them, leaving personal data untouched! > https://ad.doubleclick.net/ddm/clk/304595813;131938128;j_______________________________________________ > Scikit-learn-general mailing list > Scikit-learn-general@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/scikit-learn-general ------------------------------------------------------------------------------ Mobile security can be enabling, not merely restricting. Employees who bring their own devices (BYOD) to work are irked by the imposition of MDM restrictions. Mobile Device Manager Plus allows you to control only the apps on BYO-devices by containerizing them, leaving personal data untouched! https://ad.doubleclick.net/ddm/clk/304595813;131938128;j _______________________________________________ Scikit-learn-general mailing list Scikit-learn-general@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/scikit-learn-general
