MATLAB: Random split of a vector of unequal lengths

random numberssplit

How can I split a vector in k unequal subsets? For example, if I have 200 data, a random split might give us 63, 95 and 150. That is 1:63, 64:95, 96:150 and 151:200.
Apology for cross postings.

Best Answer

k=4
v=1:200
m=numel(v);
idx=unique([randperm(m-2,k)+1 m]);
idx0=[1 idx(1:end-1)+1];
out=arrayfun(@(ii,jj) v(ii:jj),idx0,idx,'un',0);
celldisp(out)
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