Indexing into a Container (Matlab)

Question

I need help indexing into my container for the highest value (MATLAB). Attached is my code. I have tried to do this in many ways, but the val(i) values are incapsulated with parenthesis and this presumably keeps the max function from working.

%question 2 cme106 pset 4

 

profit = 0;

Optimal_Q = 0;

expected_profit_dict = containers.Map; %Dict

for Units_Q = (80:1:140)

  sum = 0;

  for Average_Demand = (80:1:140)

    if Units_Q<= Average_Demand

      profit = Units_Q*0.6;

      disp('units_Q LESS THAN')

      disp(profit)

      sum = sum + profit;

    else if Units_Q>Average_Demand

      profit = (0.6*Units_Q) - (0.4*(Units_Q - Average_Demand));

      disp('units_Q GREATER THAN')

      disp(profit)

      sum = sum + profit;

     %find expected profit for each Q value

      end

    end

    if Average_Demand == 140

       n = 140;

       expected_profit = sum/n;

       disp('EXPECTED PROFIT')

       disp(expected_profit)

       Units_Q_title = string(Units_Q);

       expected_profit_dict(Units_Q_title) = expected_profit;

    end 

  end 

end

disp(expected_profit_dict)

 

k = keys(expected_profit_dict);

val = values(expected_profit_dict);

%disp(val)

v_prev = 0;

v_new = 0;

for i = 1:length(val)

  val(i) = v_new;

  if v_new - v_prev <= 0

    optimal_Q = expected_profit_dict(v_new);

    disp('Optimal_Q:') 

    disp(Optimal_Q)

  else

    v_new = v_prev;

  end

end

 

   

Answer 1

I would try something like this:

Max_profit=max(values(expected_profit_dict))

Values just reports the array of values inside of your dictionnary and max works on arrays already. If you need the position, one trick would be to check every iteration if the profit is maximized and if it is to 1) grab it, 2) remember the value of Unit_Q.