How to group variables in a same cluster ?

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Pradya Panyainkaew 2018-1-8

评论： Pradya Panyainkaew 2018-1-8

if I have

A=[1 2; 2 4; 3 4; 4 1; 5 1; 6 4; 7 4; 8 2; 9 1; 10 1]

where 1st column represents customer ID and 2nd column shows Clustering Number. How can I group customer ID into a same cluster such as

cluster1=[4 5 9 10], cluster2=[1,8], cluster3=[ ], cluster4=[2,3,6,7]

ANKUR KUMAR 2018-1-8

编辑：ANKUR KUMAR 2018-1-8

A=[1 2; 2 4; 3 4; 4 1; 5 1; 6 4; 7 4; 8 2; 9 1; 10 1]
id=unique(A(:,2))
for ii=1:length(id)
   iid{ii}=A(find(A(:,2)==id(ii)),1)  
end

you can see the outputs just by entering iid{1}

ANKUR KUMAR 2018-1-8

Sir, I am just a student. That was my mistake. Sorry for this.

It's fine. Don't worry. I'm a rookie also. It's not your fault. Let's share.

Guillaume 2018-1-8

Assuming your clustering numbers are all strictly positive integers:

accumarray(A(:, 2), A(:, 1), [], @(custs) {custs})

Thank you very much. it is excellent code.

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