發生向量 Incidence vectors

• 文件少、相似度高時較有效率

• Incidence vetors顧名思義就是以向量(0與1)表示文件的有無

Exercise1-4:

(1): Brutus AND Caesar but NOT Brutrs

solution:

    Brutus  => 110100
    Caesar  => 110111
    !Brutrs => !(010000)=>101111
    

(2):Calpurnia OR mercy but NOT Brutus

solution:

    Calpurnia => 010000
    Mercy     => 10111
    !Brutrs   => !(010000)=>101111