Arrange points by y cordinate within a stucture array

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Ikenna Okoye 2020-5-8

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/524096-arrange-points-by-y-cordinate-within-a-stucture-array

评论： Ameer Hamza 2020-5-11

Would anyone know a way of arranging a structure arrays points by y cordinate indescending order? I dont even know how to go about starting this. Any help would be appreciated.

For example i have a structure with each field being an element, each element has a cordinate [x,y,z] and id like to order this coulmn of points by the y cordinate.

ive tried using a nested for loop to acheive this to start parcing through the structure, but am not capturing all of the fields in the structure. OutputTable is the structure.

    for iRun = 1:1:length(outputTable)
        
        for iObj = 1:1:length(outputTable(iRun).tubingRuns.objects)
        
            objectTable = sort([outputTable.tubingRuns(iRun).objects(iObj).centroid(2)]);
            sortTable(iRun).tubingRuns.objects(nextIndex).centroid = objectTable;
        
        end
        
    end

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采纳的回答

Ameer Hamza 2020-5-8

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/524096-arrange-points-by-y-cordinate-within-a-stucture-array#answer_431304

编辑：Ameer Hamza 2020-5-8

在 MATLAB Online 中打开

Try something like this

% example struct array 's'.
s(1).coordinate = [1 4 3];  s(1).id = 1;
s(2).coordinate = [8 0 7];  s(2).id = 2;
s(3).coordinate = [5 6 12]; s(3).id = 3;
x = vertcat(s.coordinate);
[~, idx] = sort(x(:,2));
s = s(idx);

elements of 's' are sorted according to second column of 'coordinate'.