How can I add this condition on my code?

Question

Uche 2023-3-7

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1924845-how-can-i-add-this-condition-on-my-code

评论： Uche 2023-3-8

采纳的回答： Voss

在 MATLAB Online 中打开

Good evening,

Please can someone help with this scenario:

I have two column vectors as seen in the code. I want to succesively add the elements in the first column. However, each time the sum is a multiple of 100, I want to identify the point, and hold the corresponding element on the second column. These points from the second column will be added up and displayed.

For example, on this code, after adding 10+20+30+40 = 100 on the first column, the condition multiple of 100 is met. The element corresponding to this point on the second column is 5. Store this number to variable X. Continuing the addition of the first column elements, 10+20+30+40 +5= 105, the condition is not met, nothing happens to X. Back to first column, 10+20+30+40+5+60+40=205, the condition is met, and from second column X = 4+ 8, and just like that until we add up all the first column element. For this case, X should be X = 4+8+10+1=23

U = [10;20;30;40;5;60;40;80;20;100];
V = [2;3;4;5;6;7;8;9;10;1];
W = 0;
X = 0;
for i = 1:length(U)
    W = W + U(i);
    if W = 100
      X = X + V(i);
    end
end
disp(X)

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Answer 1

Voss 2023-3-7

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1924845-how-can-i-add-this-condition-on-my-code#answer_1187925

编辑：Voss 2023-3-7

在 MATLAB Online 中打开

U = [10;20;30;40;5;60;40;80;20;100];
V = [2;3;4;5;6;7;8;9;10;1];
idx = find(diff([0;floor(cumsum(U/100))]))
idx = 4×1
     4
     7
     9
    10
V(idx)
ans = 4×1
     5
     8
    10
     1
sum(V(idx))
ans = 24