決定木
例１とそのデータ形式 % メールチェック推薦システム % 'T:' Identifies the Attribute Title Line % 'A:' Identifies Training Set Examples % 'B:' Identifies Test Set Examples T: Author, Thread, Length, Where Read, User Action; A: known, new, long, home, skips; A: unknown, new, short, work, reads; B: known, new, short, home, skips; B: known, new, long, work, skips;
例２とデータ形式 %ブーリアン % 'T:' Identifies the Attribute Title Line % 'A:' Identifies Training Set Examples % 'B:' Identifies Test Set Examples T: Input 1, Input 2, Output (xor); A: 0.0, 0.0, 0.0; A: 0.0, 1.0, 1.0; A: 1.0, 0.0, 1.0; A: 1.0, 1.0, 0.0; % NO TEST EXAMPLES
例３とデータ形式 % 購入顧客 % 'T:' Identifies the Attribute Title Line % 購入顧客 % 'T:' Identifies the Attribute Title Line % 'A:' Identifies Training Set Examples % 'B:' Identifies Test Set Examples T: AGE, INCOME, STUD, CRED, BUYS; A: <=30, high, No, fair, No; A: <=30, high, No, excl, No; A: 31..40, high, No, fair, Yes; A: >40, med, No, fair, Yes; A: >40, low, Yes, fair, Yes; A: <=30, med, Yes, excl, Yes; A: 31..40, med, No, excl, Yes; A: 31..40, high, Yes, fair, Yes; A: >40, med, No, excl, No; % NO TEST EXAMPLES