Subfigure 7(A): U
; Subfigure 7(B): U
; Subfigure 7(C): Colon cancer. A comparison of multiplicity ranks for E-RFE for two synthetic data sets (A: no relevant variables; B: 5 relevant variables) and (C) colon cancer microarray data. In each panel, the boxplots indicate the distribution of the feature normalized position ν (see text for the definition) for the 5 highest rank features.