2012/12/11 hannithebunny <[email protected]>: > in the DecisionTreeClassifier one can choose either gini- or > entropy-criterion. Actually the entropy value is calculated not > correctly, because log (i.e. the natural logarithm) is applied instead > of log2. Of course, the result is the same for both cases, but the > definition of entropy applies log2.
Depends on whether entropy is measured in bits or in nats [1]. We use log base-e throughout. [1] https://en.wikipedia.org/wiki/Nat_(information) -- Lars Buitinck Scientific programmer, ILPS University of Amsterdam ------------------------------------------------------------------------------ LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial Remotely access PCs and mobile devices and provide instant support Improve your efficiency, and focus on delivering more value-add services Discover what IT Professionals Know. Rescue delivers http://p.sf.net/sfu/logmein_12329d2d _______________________________________________ Scikit-learn-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/scikit-learn-general
