convert a nested struct in a matrix

Question

elisa ewin 2017-6-5

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/343363-convert-a-nested-struct-in-a-matrix

编辑： Guillaume 2017-6-5

Hi, I have a nested struct

userTouristicTraj(1).touristicData(:).traj --> [1;1][1;1;1;1;1][1;1;1;1][1;1;1;1;1;1];[1;1];
userTouristicTraj(2).touristicData(:).traj --> [4;4][5;5]
userTouristicTraj(3).touristicData(:).traj --> [12;12;12;12;6][12;12]

and I want to trasform it in a matrix

A= [1 1 0 0 0 0; 1 1 1 1 1 0; 1 1 1 1 0 0; 1 1 1 1 1 1; 1 1 0 0 0 0; 4 4 0 0 0 0; 5 5 0 0 0 0; 12 12 12 12 6 0; 12 12 0 0 0 0]

I have try to use the functions struc2cell and cell2mat but the code doesn't run and maybe I have to use a different way

a=struct2cell(userTouristicTraj);
b=cell2mat(a);
Error using cell2mat (line 64)
The field names of each cell array element must be consistent and in consistent order.

Can you help me, please? thanks

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Answer 1

Guillaume 2017-6-5

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/343363-convert-a-nested-struct-in-a-matrix#answer_269596

编辑：Guillaume 2017-6-5

在 MATLAB Online 中打开

Assuming that all your structures have the same fields in all the substructures:

alltdata = [userTouristicTraj.touristicData];  %concatenate all touristicData into a single structure
alltraj = {alltdata.traj};   %and extract all traj into a cell array  
maxlength = max(cellfun(@numel, alltraj));
alltraj = cellfun(@(v) [v.', zeros(1, maxlength - numel(v))], alltraj, 'UniformOutput', false)  %pad as necessary
alltraj = vertcat(alltraj{:});