MATLAB: Incrementing value in an executing loop

loop

I have a matrix A =
12    13     6     7
 5     4     5     1
 2     2    11    13
 7     1     3     6
and the following code:
%%%%(th=threshold)
th=4 
for i=1:4
  for j=1:4
    if A(i,j) < th 
      A(i,j) = 0;
      G=nnz(A);
    end
  end
end
I have calculated nnz where I get G=11,for threshold 4.
Now I want to automatically increment the th value such that if G is less than 5 the loop should termainate, and find the value of th when the loop terminated.

Best Answer

th=4 
for i=1:4
      for j=1:4
        if A(i,j) < th 
            A(i,j) = 0;
            G=nnz(A);
              if G<5
                th=th+1;
                break;
              end 
         end
      end
  end
this may help you...
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