?? kmeans_evaluation3.m
字號:
function [J]= kmeans_evaluation3(y, class_label, center)
%
%
%
[nr, nc] = size(y);
[k, c] = size(center);
for i = 1:1:k
t = 1;
for j = 1:1:nr
if i == class_label(j)
x(t,1:c) = y(j,1:c);
t = t+1;
end
end
[xr,xc] = size(x);
d(i) = 0;
for j = 1:1:xr
d(i) = d(i) + (x(j,:)-center(i,:))*(x(j,:)-center(i,:))';
end
clear x
end
J = sum(d)/nr;
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