Expectation Maximization

E[Zij] = P(x=xi|μ-μj)/kΣi=1 P(x=xi|μ=μj)
Mj = ΣiE[Zij]xi/ΣiE[Zij]
Expectation(define z from μ), Maximization(define μ from z)

Clustering properties Pd<-clustering scheme ・Richness ・Scale-variance ・Consistency