how do i run a loop that extract some file into nested structure

2020 5 17
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更新时间：2020 5 23
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gaitvariable is the structure that i have. Inside that there are more structures called P#. Each P# contains more row vectors. I would like to create a loop that give me the concatanation of the pic's vector, as follow:
t_stride_total=[t_strideP345,t_strideP89....]
I only started the code because I found difficulties with fields of structure
adult_abs=[];
adult_rel=[];
filename = 'gaitvariables_adults.mat';
T = load(filename);
C = struct2cell(T);
folder= C{1}
D= struct2cell(folder);
subfolder= D{1}

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Ameer Hamza
Ameer Hamza 2020-5-17

0 个投票

Try something like this
S.a = [1 2 3]; % example struct
S.P123.t_stride = [4 5 6];
S.P345.t_stride = [3 2 1];
S.P1234.t_stride = [7 6 8];
names = fieldnames(S);
t_stride = cell(1,numel(names));
for i=1:numel(names)
name = names{i};
if name(1)=='P'
t_stride{i} = S.(name).t_stride;
end
end
t_stride = [t_stride{:}];

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Ameer Hamza
Ameer Hamza 2020-5-18
Can you attach your data as a .mat file?
matteo bottoni
matteo bottoni 2020-5-18
load gaitvariables_adults.mat
names = fieldnames(gaitvariables);
t_stride = cell(1,numel(names));
for i=1:numel(names)
name = names{i};
if name(1)=='P'
t_stride{i} = S.(name).t_stride;
end
end
t_stride = [t_stride{:}];
and the error is this
Unable to resolve the name S.P431S1.t_stride.
Error in fase3 (line 12)
t_stride{i} = S.(name).t_stride;
Ameer Hamza
Ameer Hamza 2020-5-18
This line should be
t_stride{i} = gaitvariables.(name).t_stride;
matteo bottoni
matteo bottoni 2020-5-18
I'm sorry I've understood only now how does it work, because I forgot the example struct. I deleted it because I've understood wrongly that it works without the calling of all file firslty.
matteo bottoni
matteo bottoni 2020-5-23
Hi man, what have I to change if I need now not more final concatenation but I want a vector for each patient?
Ameer Hamza
Ameer Hamza 2020-5-23
Remove this line
t_stride = [t_stride{:}];
It will give you a cell array.
matteo bottoni
matteo bottoni 2020-5-23
I need to understand the structure better in some way. Thank you so much Ameer

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