Performance curves for the Affymetrix datasets. Rows represent curves obtained using different classifiers, while columns represent curves for different datasets. Within each cell, performance curves associated with different preprocessing methods are shown in separate colors. The color scheme is shown at the bottom of the figure. Within a cell the x-axis provides the signature size, while the y-axis gives the average balanced accuracy over 50 splits. For each dataset and split, the top-100 feature set was computed using the multi-rank strategy and this ranking was subsequently used for all classifiers in order to construct signatures.