function?[LC]?=?kmeanspp（Xk）
%KMEANS?Cluster?multivariate?data?using?the?k-means++?algorithm.
%???[LC]?=?kmeans_pp（Xk）?produces?a?1-by-size（X2）?vector?L?with?one?class
%???label?per?column?in?X?and?a?size（X1）-by-k?matrix?C?containing?the
%???centers?corresponding?to?each?class.
%???Version:?2013-02-08
%???Authors:?Laurent?Sorber?（Laurent.Sorber@cs.kuleuven.be）
X=X‘;
L?=?[];
L1?=?0;
while?length（unique（L））?~=?k
????%?The?k-means++?initialization.
????C?=?X（:1+round（rand*（size（X2）-1）））;?%size（X2）是數(shù)據(jù)集合X的數(shù)據(jù)點(diǎn)的數(shù)目，C是中心點(diǎn)的集合
????L?=?ones（1size（X2））;