您必须识别集群,然后排列它们:
可以通过查找它们的差异变化来找到集群:
diffA = diff(A);
clusters_start = [1 ; find(any(diffA,2)~=0)+1];
然后通过以下方式轻松找到集群末端:
clusters_end = [clusters_start(2:end)-1 ;size(A,1)];
clusters_length = clusters_end-clusters_start+1;
现在您知道了集群的数量,您可以对它们进行置换:
Nclusters = numel(clusters_start);
perm_idx = randperm(Nclusters );
clusters_start = clusters_start(perm_idx);
clusters_end = clusters_end(perm_idx);
clusters_length = clusters_length(perm_idx);
并将它们放入一个新矩阵中:
newA = NaN(size(A));
for ii=1:Nclusters
newA(sum(clusters_length(1:ii-1))+(1:clusters_length(ii)),:) = A(clusters_start(ii):clusters_end(ii),:);
end