Togaware DATA MINING
Desktop Survival Guide
by Graham Williams
Google

importance

The importance option allows us to review the importance of each variable in determining the outcome. The first importance is the scaled average of the prediction accuracy of each variable, and the second is the total decrease in node impurities splitting on the variable over all trees, using the Gini index.

See http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1796903



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