Vector space mode Represent documents by concept vectors Each concept defines one dimension k concepts define a high-dimensional space Element of vector corresponds to concept weight E.g. , d=(x,.,Xk),Xi is"importance"of concept i in d Distance between the vectors in this concept space Relationship among documents CSoUVa CS 6501: Text MiningVector space model • Represent documents by concept vectors – Each concept defines one dimension – k concepts define a high-dimensional space – Element of vector corresponds to concept weight • E.g., d=(x1 ,…,xk ), xi is “importance” of concept i in d • Distance between the vectors in this concept space – Relationship among documents CS@UVa CS 6501: Text Mining 17