Figure 2

Actual vs. Label-Shuffled Classifier Box-plots. 100 classifiers represent each TF, meaning that cross-validation produces a population of PPV measurements to represent a TF classifier. These populations are used to compare the significance of the actual vs. the label-shuffled classifiers (denoted with the prefix "Rand"). Here the comparison is shown for WT1, Myc, and OCT4. Each box-and-whisker plot has a top line (the upper quartile value-not whisker line), a central red line (the median), and a bottom (the lower quartile value). If the notches on two different boxes do not overlap then one may conclude that the two population medians are significantly different (at the 5% level). Each box also has whiskers which look like standard error bars. The length of a whisker equals 1.5 times the interquartile range, which is the default value in Matlab [214]. Plus(+) signs represent potential outlier points existing beyond that default range.