@RELATION test5 @ATTRIBUTE attr0 REAL @ATTRIBUTE attr1 REAL @ATTRIBUTE attr2 REAL @ATTRIBUTE attr3 REAL @ATTRIBUTE class {class0, class1, class2, class3} @DATA 0.1, 0.2, 0.3, 0.4,class1 -0.1, -0.2, -0.3, -0.4,class2 1, 2, 3, 4,class3