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Generate efficiently an array of all combinations of a range of elements

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roger why
roger why on 17 Mar 2021
Answered: Mohammad Sami on 18 Mar 2021
I would like generate efficiently an array of all combinations of a range of integeers between 0 and 3. SO that each element of my array will be in the form of [i j k l] where i, j, k and l are from 0 to 3. I want to use build in Matlab functions Instead of looping like the following:
for i=0:3
for j=0:3
for k=0:3
for l=0:3
possibility=[i j k l];
end
end
end
end
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Accepted Answer

Mohammad Sami
Mohammad Sami on 18 Mar 2021
You can try the following.
[x1,x2,x3,x4] = ndgrid(0:3,0:3,0:3,0:3);
allpossible = [x1(:) x2(:) x3(:) x4(:)];

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