<p>The results for (a) <i>Satimage</i>, (b) <i>Shuttle</i>, (c) <i>Optdigits</i>, (d) <i>Pendigits</i>, and (e) <i>Isolet</i>. The lines show the classification accuracies in the transformed feature spaces for each method. The colors indicate the transformation methods, as shown in the legend.</p