Matrix of possible combinations
I have a vector A of 30 elements. Each of those elements could be one of three values (1, 2 or 3). There are therefore there are 30^3=27000 possible vectors A. How could I create a matrix [30 x 27000] where each colum in that matrix is a unique A?
John Williams answered .
2025-11-20
[c{1:30}]=ndgrid(1:3);
allAs=cat(31,c{:});
allAs=reshape(allAs, [],30).';
Otherwise, you can use combvec,
c(1:30)={1:3};
allAs=combvec(c{:});