APPLYING INFORMATION RETRIEVAL TO TEXT MINING Data mining Lab 이아람

IR ( Information retrieval )  Returning relevant texts for query  A measure of similarity is computed between the query and each document  The similarity scores The vector space model

Counting Letters

Counting words

Counting Pronouns Occurring

heshe himher hisher hishers himselfherself

TEXT COUNT AND VECTOR

Vectors and Angles  두 Text 를 비교하기 위해 Angle 이용  Vector 를 이용하여 Angle 을 구한다.  Angle 값이 0 에 가까울 수록 두 Text 는 유사함

Vectors and Angles  Inner product  Dot product

Vectors and Angles  Vector length =

Computing Angles

cosθ = Angle of radians, which about 26.5º