Saturday, 21 July 2007

st.statistics - What is the probabilistic counterpart of weighted K-Means

pKNN+AL (Jain and Kapoor, 2009) is a probabilistic modification of the KNN classifier. Given a set of points x1,ldots,xn from mathbbRd, labels y1,ldots,yn from [1,C], and a Mercer kernel K, the probability of x belonging to class c is



fracfrac1ncsumi:yi=cK(x,xi)sumt=1Cfrac1ntsumi:yi=cK(x,xi)



where nc is the number of xi that belong to class c. It is also an active learning algorithm and comes with a MATLAB implementation.

No comments:

Post a Comment