FIGURE 2.

The major features after the 10 times process of minimum redundancy/maximum relevance selection during the outer loop of the nested cross-validation illustrated using the eight networks of Shen’s 268-region parcellation. (A) The major features that were selected nine or 10 times during the nested cross-validation of the bipolar disorder and healthy control groups. (B) The major features that were selected 10 times during the nested cross-validation of the bipolar I disorder and healthy controls groups. (C) The major features that were selected 10 times during the nested cross-validation of the bipolar II disorder and healthy control groups. (B,C) were selected 10 times because of the very large number of features selected when nine or 10 times were used. To make the illustration more readable, only the features selected 10 times are shown. Red line represents the connectivity of patients being higher than healthy controls, and blue line represents the connectivity of patients being lower than healthy controls.