Importance measures on NMR candida data. in the range from 0.35 to 4 ppm (indicated in the upper figure) for all 1500 spectral channels (indicated in the lower figure). Top: p-values of a t-test (black) and Wilcoxon test (gray). Below: Gini importance of a random forest with 3000 trees (gray) and 6000 trees (black). Compare t ranked measures in Fig. 3.