regaeig - don't try to call the above arrays by their indices. This can lead to errors, confusion, etc. and has been discussed in great detail on this forum (see Stephen's post at Why Variables Should Not Be Named Dynamically (eval)). Instead, just save your data to a cell array
myData = cell(3,1);
myData{1} = [[1,2,3];[11,22,33];[111,222,333]];
myData{2} = [[4,5,6];[44,55,66]];
myData{3} = [[7,8,9]];
and then access the data as
for u =1:3
s = myData{u};
end
