A direct implementation could be done like this:
A={[1 2 3 4] [4 5 6 9] [1 2 3] [7 8 9] [1 2] [3 4]};
sizes= [];
for idx=1:length(A)
Vsize = length(A{idx});
if ~ismember(Vsize,sizes)
sizes = [sizes,Vsize];
Pos = find(ismember(sizes,Vsize));
idx_in_A{Pos} = idx;
else
Pos = find(ismember(sizes,Vsize));
idx_in_A{Pos} = [idx_in_A{Pos},idx];
end
end
expected_result = cell(length(idx_in_A),1);
for idx= 1:length(idx_in_A)
expected_result{idx} = {A{idx_in_A{idx}}};
end
