How do I sum the outputs of a for loop?

I`ve created this code to simulate winning the lottery if the person plays 100 times with same numbers. I want to add up the total winnings from the 100 times but not sure how to write the code.

%Player`s Numbers 
PLayers_Numbers = input('Pick 6 different numbers from 1 to 59(Vector form):')

for i = 1:1:100
   
%Winning Numbers
Winning_Numbers = datasample(1:59,6);

%Number of correct numbers
Matching_Numbers = ismember(Winning_Numbers,PLayers_Numbers);
Correct_Numbers = nnz(Matching_Numbers);

%Calculation of Winnings 
switch Correct_Numbers
    case{3}
        Winnings = 25
    case{4}
        Winnings = 100
    case{5}
        Winnings = 1000
    case{6}
        Winnings = 1000000
    otherwise
        Winnings = 0;  
end 
end

Answer 1

[Rik]

Create a variable before the loop and set it to 0. Inside the loop you can add the value of Winnings to this variable.

[Georgia Parry]

%Player`s Numbers 
PLayers_Numbers = input('Pick 6 different numbers from 1 to 59(Vector form):')

Winnings = 0;

for i = 1:1:100
    
Total_winnings=0      

%Winning Numbers
Winning_Numbers = datasample(1:59,6);

%Number of correct numbers
Matching_Numbers = ismember(Winning_Numbers,PLayers_Numbers);
Correct_Numbers = nnz(Matching_Numbers);

%Calculation of Winnings 
switch Correct_Numbers
    case{3}
        Winnings = 25
    case{4}
        Winnings = 100
    case{5}
        Winnings = 1000
    case{6}
        Winnings = 1000000
    otherwise
        Winnings = 0;  
end 
Total_winnings = Total_winnings + Winnings
end

This doesn`t seem to work. Not sure if Total_winnings = Total_winnings + Winnings is ccrrect

[Georgia Parry]

Also is there a way to prodcue a vector of all the individual winnnings ?

[Rik]

Please format your comment using the edit tools.

You initialized the wrong variable.

%Player`s Numbers
PLayers_Numbers = input('Pick 6 different numbers from 1 to 59(Vector form):');

winning_vector=zeros(1,100);

for n = 1:numel(winning_vector)
    
    %Winning Numbers
    Winning_Numbers = datasample(1:59,6);
    
    %Number of correct numbers
    Matching_Numbers = ismember(Winning_Numbers,PLayers_Numbers);
    Correct_Numbers = nnz(Matching_Numbers);
    
    %Calculation of Winnings
    switch Correct_Numbers
        case 3
            Winnings = 25;
        case 4
            Winnings = 100;
        case 5
            Winnings = 1000;
        case 6
            Winnings = 1000000;
        otherwise
            Winnings = 0;
    end
    winning_vector(n)=Winnings;
end
Total_winnings=sum(winning_vector);

[Georgia Parry]

Thank You very much works perfectly.

[Rik]

Glad to be of help. If you have any remaining issue, feel free to comment, if not, feel free to mark my answer as accepted answer.

[Georgia Parry]

Last quick question I need to simulate it for up to around n=1:4000 but my laptop can`t seem to compute this. Is this becasue the code is too complex?

[Rik]

That will take 40 times as much time to calculate. Have you waited that long?

Another strategy is to to simulate the choices all at once. Your current code simply repeats the same thing 100 times, but what you probably want is to generate a random vector with randi(59,1,6). If you do randi(59,4000,6) instead, you can remove most of the iterations. I'm on mobile, so writing example code is a bit difficult.

Matlab code is never too complex for your computer to run. It may be too complex for you to write it without a mistake, or it may be too slow. A faster computer will be faster, but better written code will be much more effective in saving time.

[Georgia Parry]

okay thank you for all the help. Been very very helpful