Appendicitis data set 1: Description. This dataset was proposed in S. M. Weiss, and C. A. Kulikowski, Computer Systems That Learn (1991). The data represents 7 medical measures taken over 106 patients on which the class label represents if the patient has appendicitis (class label 1) or not (class label 0). 2: Type. Classification 3: Origin. Real world 4: Instances. 106 5: Features. 9 6: Classes. 2 7: Missing values. No 8: Header. @relation appendicitis @attribute At1 real[0.0,1.0] @attribute At2 real[0.0,1.0] @attribute At3 real[0.0,1.0] @attribute At4 real[0.0,1.0] @attribute At5 real[0.0,1.0] @attribute At6 real[0.0,1.0] @attribute At7 real[0.0,1.0] @attribute Class {0,1} @inputs At1, At2, At3, At4, At5, At6, At7 @outputs Class