Fig. 3From: A stacking-based model for predicting 30-day all-cause hospital readmissions of patients with acute myocardial infarctiona NCR treatment for the sample belongs to the majority subset; b NCR treatment for the sample belongs to the minority subset. The green ball represents the majority sample; the red ball represents the minority sample; the green triangle and the red triangle represent the majority and minority samples for analysis, respectively; the samples in the dotted ellipse circle represent the sample to be analyzed and its three closest neighborsBack to article page