find the index who have the max value in cell structure

Question

ahmad 2022-8-23

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1783800-find-the-index-who-have-the-max-value-in-cell-structure

评论： Voss 2022-8-30

i have a cell structure like this:

ex1=[1 2 3];
ex2=[2 3 0];
for i=1:3
a(i).b=struct('ex1',ex1(i),'ex2',ex2(i));
end

how can i find the index of a(i) who have the max value of ex1 but the ex2 must be greater than 0?

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Answer 1

Voss 2022-8-23

1
链接

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https://ww2.mathworks.cn/matlabcentral/answers/1783800-find-the-index-who-have-the-max-value-in-cell-structure#answer_1030955

编辑：Voss 2022-8-30

在 MATLAB Online 中打开

ex1=[1 2 3];
ex2=[0 3 2];
for i=1:3
    a(i).b = struct('ex1',ex1(i),'ex2',ex2(i));
end
temp = [a.b];
posidx = find([temp.ex2] > 0);
[maxval,tempidx] = max([temp(posidx).ex1]);
maxidx = posidx(tempidx);
disp(maxval);
     3
disp(maxidx);
     3

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ahmad 2022-8-30

在 MATLAB Online 中打开

why if the ex2 start with 0 the answer of index is not the same as the max value of ex1 anymore?

for example is i change ex2 to ex2=[0 3 2] like this

ex1=[1 2 3];
ex2=[0 3 2];
for i=1:3
    a(i).b = struct('ex1',ex1(i),'ex2',ex2(i));
end
temp = [a.b];
[maxval,maxidx] = max([temp([temp.ex2] > 0).ex1])
maxval = 3
maxidx = 2