Kernel smoothed density for FDA MAQC-II data. The joint probability density functions are plotted for one classifier at a time on the FDA MAQC-II data. The sum of the integrated curves equals one. The window focuses on the better performing feature sets near the extreme of the distribution. The solid lines and dashed lines correspond to linear and nonlinear classifiers, respectively. Panels A - H correspond to the MAQC-II datasets in Table 5.