% now I want to know the saving over time
% that is why I need to record the 52 values of total_saving over the year
total_saving(1) = 0;

% iterate through all the 52 weeks in a year
% but here I start with week 2?
% 1st question: why? do I need to start from week 2?
% 2nd question: what to fix so that first week's saving is counted too!
for week=2:52
  % rand() returns a random number between [0.0 .. 1.0]
  % multiply it with 25 to have [0.0 .. 25.0] range
  saving_this_week = rand() * 25;
  % accumulate the saving so far
  % see the way I reference last week saving using 'total_saving(week-1)'!
  total_saving(week) = total_saving(week-1) + saving_this_week;
end

% display the saving in y axis, by default x axis is 1 to 52.
plot(total_saving);