19. The method of claim 13 , wherein the objects comprise the intensities of one or more features and/or one or more peaks in mass spectrometry data.
21. The method of claim 19 , wherein the objects in the training set comprise the data obtained from two classes of patients: 1) a first class of patients that derive benefit from a particular therapy for treatment of a health condition and 2) a second class of patients that either do not derive benefit, or suffer adverse effects from the particular therapy for treatment of the health condition, and wherein the classes assigned to the objects correspond to the two classes of patients.