MATLAB: While loop for tolerance between two vectors

tolerancewhile loop

Please can you help me to find a code for a while loop;
pseudo code
code to calculate vector 1
code to calculate vector 2
while the distance between vector 1 and vector 2 is greater than a tolerance do;
    replace vector 1 with vector 2
    code to work out the new vector 2
end
outputs the first "vector 2" for which the tolerance is met

Best Answer

vector1 = rand(1, 100);
vector2 = rand(1, 100);
while norm(vector1 - vector2) > tol
  vector1 = vector2;
  vector2 = rand(1, 100);
end
Please note, that this does not necessarily stop in finite time. Therefore a good programmer would add a counter:
counter      = 0;
counterLimit = 1e6;
while norm(vector1 - vector2) > tol && counter < counterLimit
  counter = counter + 1;
  ...
end
if count == counterLimit
  warning('failed')
end
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