Figure 1.

Feature importance by classifier: On the horizontal axis, the top features are reported, following their ensemble ranking. The intensity of the color in each square represents the frequency of appearance of that particular feature in the 10 instances of the same classifier produced by cross-validation; the darker the color, the more frequent the appearance of that feature among the most important. It is noticeable how different classifiers rank features differently. For this figure, we report the top 42 features only for visualization purposes.