Class posterior probabilities. The predictive power of several classifiers is displayed for each true class in Y _test . Most prediction probabilities fall between ~[70–100]% (bright colors). For example: the Linear SVM correctly predicts ~92% (2060 elements) of the subset of “true C2” (around 2240 elements) in Y _test (cf. Table F.17) with class prediction probabilities between 0.7 and 1 (bright colors).