In the prediction of OS after gastrectomy with our data set, K = 3, m = 5 and the five views are basic information of patients, such as height, weight, and cancer history of immediate relatives; pathological indexes, such as cancer classification, number of cancer nodules, and tumor diameter; treatment methods, such as chemotherapy, radiotherapy, and operation; preoperative tumor markers, such as AFP, hemoglobin, and CA125; and postoperative tumor markers. The gene discussed is AFP; the disease is cancer.