Ovarian cancer data ranking comparison. Comparison of rankings obtained from several feature selection methods for the Ovarian cancer dataset. Each small panel shows the comparison of two rankings. A point with coordinates (i, j) corresponds to the feature with score i in one method and score j in the other (for each method the most important features receive the highest scores). Values of the Spearman correlation coefficient for each pair of scoring functions are given in the panels above the diagonal. Notice significant differences between various rankings even within the group of the highest scored features. RF ranking stands out the most as in the case of prostate cancer data.