Creating a counting vector for "wins"

Question

Elliot Gegen 2019-2-27

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/447219-creating-a-counting-vector-for-wins

评论： Elliot Gegen 2019-3-10

Hello, I am doing an assignment for class which is called "even and odds" . It is similar to rock paper scissors but easier. What I am having trouble on is count the wins for each player. Here is my code

totalgames = 100;
odd_wins = zeros(1,totalgames);
even_wins = zeros(1,totalgames);
Totalgames = [1:totalgames];
for i=1:totalgames
    x1(i) = randi(1:2,1);
    x2(i) = randi(1:2,1);
    total = x1(i)+x2(i);
    if (total == 3);
        odd_wins(i) = odd_wins(i) + 1;
      
    else
        even_wins(i) = even_wins(i) + 1;
        
    end
end

My goal is to have odd_wins and even_wins row vector to keep track of how many times they have one for example [1,1,1,2,3,4,4,4,5...etc]. But these vectors always return [0,0,0,1,0,1,1...etc] where 0 means it lost and 1 means it won. How can I make it so it adds one to the value before it? Thank you!

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Answer 1

Sreelakshmi S.B 2019-3-4

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/447219-creating-a-counting-vector-for-wins#answer_363702

A simple solution:

totalgames = 100;
odd_wins = zeros(1,totalgames);
even_wins = zeros(1,totalgames);
%% special case for the first game
x1(1) = randi(2);
x2(1) = randi(2);
total = x1(1)+x2(1);
if (total == 3)
     odd_wins(1) = 1;
else
     even_wins(1) = 1;
end
for i=2:totalgames
    
    x1(i) = randi(2);
    x2(i) = randi(2);
    total = x1(i)+x2(i);
    
    
    if (total == 3)
        odd_wins(i) = odd_wins(i-1) +1;
        even_wins(i) = even_wins(i-1);
      
    else
        even_wins(i) = even_wins(i-1) + 1;
        odd_wins(i) = odd_wins(i-1);
        
    end
end