Figure 2.

Changing of ROC curve area with size of expression profiles. Permutation median (blue line) and 90% CI (orange lines) of ROC curve area summarized from two independent datasets and 10,000 re-samplings. ROC curves were built with SEP scores of testing patients at each re-sampling while SEP was calculated with expression profiles identified from the training patients. The size of expression profiles was increased from 1 to 100 one by one. Average curve area of two testing subgroups was weighted by their size.