%
%?[idxnetsimdpsimexpref]=apcluster（sp）??Demo:?Type?“apcluster?“
%
%?APCLUSTER?uses?affinity?propagation?（BJ?Frey?and?D?Dueck?Science?2007）
%?to?identify?exemplars?and?clusters?using?a?set?of?real-valued?pairwise
%?data?point?similarities?as?input.?Each?cluster?is?represented?by?a?data
%?point?called?an?exemplar?and?the?method?iteratively?searches?for
%?clusters?so?as?to?maximize?an?objective?function?called?net?similarity.
%?The?command?apcluster（sp‘plot‘）?plots?the?objective?function.
%?
%?For?N?data?points?there?are?potentially?N^2-N?pairwise?similarities?
%?which?can?be?input?as?an?N-by-N?matrix?‘s‘?where?s（ik）?is?the?
%?similarity?of?point?i?to?point?k?（note:?s（ik）?need?not?equal?s（ki））.
%?In?fact?only?a?smaller?number?of?relevant?similarities?ar