extracting the second column of all cells of a struct

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Sahar khalili 2022-10-11

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1822558-extracting-the-second-column-of-all-cells-of-a-struct

评论： Sahar khalili 2022-10-12

I have a struct, x1_surf, that contains 1070 cells, each cell has 4 cells, now I want to extract the second column of the inner cells with the order.

This is x1_surf

This is the x1_surf{1,1}

now, I want to extract the second column of all inccer cells with the correct order, I mean x1_surf{1,:}{1,2}

I write a script like that:

It works correcly for some files, however for some other files, the order of the date is mixed up and they are not in the right order. Could anyone help me how I can rewise it?

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Stephen23 2022-10-11

You should replace all of the nested 1x4 cell arrays with TIMETABLEs or TABLEs.

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采纳的回答

David Hill 2022-10-11

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1822558-extracting-the-second-column-of-all-cells-of-a-struct#answer_1071618

在 MATLAB Online 中打开

for k=1:length(x1_surf)
    x2_surf{k}=x1_surf{k}{2};
end

5 个评论
显示 3更早的评论隐藏 3更早的评论

David Hill 2022-10-12

在 MATLAB Online 中打开

x1_surf.mat

I am assuming you just want just one listing of all the date-times.

load('x1_surf.mat');
x2_surf=[];
for k=1:length(x1_surf)
    x2_surf=[x2_surf;x1_surf{k}{2}];
end
x2_surf(1:20)
ans = 20×1 datetime array
   11-Sep-2019 13:29:00
   11-Sep-2019 13:39:00
   11-Sep-2019 13:49:00
   11-Sep-2019 13:59:00
   11-Sep-2019 14:09:00
   11-Sep-2019 14:19:00
   11-Sep-2019 14:29:00
   11-Sep-2019 14:39:00
   11-Sep-2019 14:49:00
   11-Sep-2019 14:59:00
   11-Sep-2019 15:09:00
   11-Sep-2019 15:19:00
   11-Sep-2019 15:29:00
   11-Sep-2019 15:39:00
   11-Sep-2019 15:49:00
   11-Sep-2019 15:59:00
   11-Sep-2019 16:09:00
   11-Sep-2019 16:19:00
   11-Sep-2019 16:29:00
   11-Sep-2019 16:39:00