MATLAB: Is the loop getting skipped? I wanted las to take last array of trk with a value in it. but for some the loop seems to get skipped.. What am I doing wrong? Can someone please help?

cell arraysfor loop

tk = 1;
trk = { [1;1], [1;1], [1;1], [1;1], [0;0], [0;0], [0;0]};
las =[];
if isempty(las)
    las = [0;0];
    for roll = 7:1
        las = cell2mat(trk{tk,roll});
        if (las(1,1) ~= 0) || (las(2,1) ~= 0)
            break
        end
    end
end
OUTPUT
    las =
         0
         0
    roll =
         []

Best Answer

   for roll = 7:1
Above is equivalent to
   for roll = 7:1:1
what happens when add +1 to 7 and the test for another pass in the loop?
Need the -1 step increment to walk backwards.
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