help in sorting through a concatenated data

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hasnain ali
hasnain ali 2021-3-15
编辑： Aghamarsh Varanasi 2021-3-17
hey guys i am trying to sort through a concatenated data which i got by reading a .mat file for a month and concatenated them together. now i have to acess the data from that file which is a structure with fields and have a cell array for every data figure attached below. i have to sort through this data for example i have to gather the time stamp for the whole month from that data and concatenate them together and then make a double array with another data point from the sheet but i can't seem to figure that out.
the code i used to put them together is added as well
% clear
% PathName = uigetdir;
% file_all = dir(fullfile(PathName,'*.mat'));
% matfile = file_all([file_all.isdir] == 0);
% clear file_all PathName
% d=dir('*.mat'); % get the list of files
% x=[]; % start w/ an empty array
% for i=1:length(matfile)
% x=[x; load(matfile(i).name)]; % read/concatenate into x
% end
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hasnain ali
hasnain ali 2021-3-15
tried cell2mat as well
Brace indexing is not supported for variables of this type.
Error in cell2mat (line 42)
cellclass = class(c{1});
Error in January (line 29)
A= cell2mat(x);
gives me this error
hasnain ali
hasnain ali 2021-3-15
load('january.mat')
A=[];
for i=1:length(x)
% S = vertcat( A , x.PCTimeStamp(i));
s=x.PCTimeStamp(i);
end
Expected one output from a curly brace or dot indexing expression, but there were 31 results.
Error in January (line 26)
s=x.PCTimeStamp(i);
if i try this code i get this error

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回答（1 个）

Aghamarsh Varanasi
Aghamarsh Varanasi 2021-3-17
编辑：Aghamarsh Varanasi 2021-3-17
Hi,
The variable 'x' in your attached screenshot is a structure array, which can be accessed in the following way.
s = x(i).PCTimeStamp;
For more info, refer to Structure Arrays and Access Elements of a Nonscalar Structure Array documentation pages.
If you want to sort the elements in the variable 'x' refer to this.

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