Feature ranking, as determined via the Fisher score method, for the experiments reported in this paper. The x-axis is the normalized Fisher score and the y-axis is the feature rank. Red identifies features based on topology and geometry; blue indicates SHARPs features. The features are plotted in descending order of the F-Score value on the x-axis and ascending order of the rank on the y-axis (both axes are inverted). The topological features described by the formats pos_intvl_n and neg_intvl_n represent the number of holes for the nth magnetic flux threshold for the positive and negative polarities respectively.