Could not find pmin , apclusterK

Expression or statement is incorrect--possibly unbalanced , apclusterK.m

Solution:

N=max(max(s(:,1)),max(s(:,2))); 
S=-Inf*ones(N,N);

changed to be  
 
N=max(max(s(:,1)),max(s(:,2))); 
S=zeros(N,N);

ref:

http://www.psi.toronto.edu/index.php?q=affinity%20propagation