Help with operations between elements from a matrix

Question

Paulo Cunha 2022-1-28

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1638490-help-with-operations-between-elements-from-a-matrix

评论： Voss 2022-1-29

Hi, everybody

First of all, it is not a homework, it is a real operation that I need to do in my project, but I can't..

It is hard to explain, but I need to make a ponderation between elements with the same ID using the values from a column. The exactly operations are in the comments below:

26 1 % 26/26 = 1

35 2 % 35/35 = 1

27 3 % 27/27 = 1

25 4 % 25/25 = 1

41 5 % 41/(41+28+34) = 0.3981

28 5 % 28/(41+28+34) = 0.2718

34 5 % 35/(41+28+34) = 0.3398

34 6 % 34/(34+34) = 0.5

29 7 % 29/(29+34) = 0.4603

34 7 % 34/(29+34) = 0.5397

24 8 % 28/28 = 1

35 9 % 35/(35+38+29+28) = 0.2692

38 9 % 38/(35+38+29+28) = 0.2923

29 9 % 29/(35+38+29+28) = 0.2231

28 9 % 28/(35+38+29+28) = 0.2154

40 10 % 40/(40+34) = 0.5405

34 10 % 34/(40+34) = 0.4594

The solution would be:

26 1 1

35 2 1

27 3 1

25 4 1

41 5 0.3981

28 5 0.2718

34 5 0.3398

34 6 0.5

29 7 0.4603

34 7 0.5397

24 8 1

35 9 0.2692

38 9 0.2923

29 9 0.2231

28 9 0.2154

40 10 0.5405

34 10 0.4594

I don't know if I made it really clear, but I really need help here.

Att,

Paulo

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Answer 1

Voss 2022-1-28

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1638490-help-with-operations-between-elements-from-a-matrix#answer_884185

在 MATLAB Online 中打开

data = [ ...
1; ...
2; ...
3; ...
4; ...
5; ...
5; ...
5; ...
6; ...
6; ...
7; ...
7; ...
8; ...
9; ...
9; ...
9; ...
9; ...
10; ...
10; ...
    ];
data(:,end+1) = 0;
[uID,~,jj] = unique(data(:,2));
for ii = 1:numel(uID)
    idx = jj == ii;
    data(idx,end) = data(idx,1)./sum(data(idx,1));
end
disp(data);
0000    1.0000    1.0000
0000    2.0000    1.0000
0000    3.0000    1.0000
0000    4.0000    1.0000
0000    5.0000    0.3981
0000    5.0000    0.2718
0000    5.0000    0.3301
0000    6.0000    0.5000
0000    6.0000    0.5000
0000    7.0000    0.4603
0000    7.0000    0.5397
0000    8.0000    1.0000
0000    9.0000    0.2692
0000    9.0000    0.2923
0000    9.0000    0.2231
0000    9.0000    0.2154
0000   10.0000    0.5405
0000   10.0000    0.4595