Group a Array Elements

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Hamidreza Rafat
Hamidreza Rafat on 4 Apr 2018
Answered: KSSV on 4 Apr 2018
X=[1 2 3 3 3 1]
index 1 -> 1 index 2 -> 2 index 3 -> 3 index 4 -> 3 index 5 -> 5 index 6 -> 1
y=[{1,6},{2},{3,4,5}]
How create matrix y?

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Accepted Answer

KSSV
KSSV on 4 Apr 2018
X=[1 2 3 3 3 1] ;
[c,ia,ib] = unique(X) ;
iwant = cell(length(c),1) ;
for i = 1:length(c)
iwant{i} = find(ib==i) ;
iwant{i}
end

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