Classification Using Vector Spaces Each training doc a point(vector)labeled by its topic(= class Hypothesis: docs of the same class form a contiguous region of space We define surfaces to delineate classes in spaceClassification Using Vector Spaces ◼ Each training doc a point (vector) labeled by its topic (= class) ◼ Hypothesis: docs of the same class form a contiguous region of space ◼ We define surfaces to delineate classes in space