Problem in properly creating a structure to store data

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Hello everyone,
I have created a number of different data files (in .txt) form. I would like to import them inside a larger structure before I save the enviroment, however I face a problem when constructing it.
In the past had come across a solution that would allow me to create a structure (Let's say S) but I am currently unable to locate it. Based on a similar algorithm I found (Importing multiple text files into MATLAB - (mathworks.com)) I can import all dataset within a structure, but in order for me to call a specific one I need to call with the `expression S.data(i)`. This mean that I should create a table for all different conditions of each one of the ~430 datasets, in order to remember which condition corresponds to which value of `i`.
I was hoping to be able to dynamically name the subgroups within the structure in order ot use the `S.dataset_name' format. Is there any way to achieve it without messing a lot with IOPS time?
Thanks in advance!

Accepted Answer

Stephen23
Stephen23 on 10 Jan 2022
Edited: Stephen23 on 10 Jan 2022
The simple and efficient approach:
P = 'absolute or relative path to where the files are saved';
S = dir(fullfile(P,'*.txt'));
for k = 1:numel(S)
F = fullfile(P,S(k).name);
S(k).data = readtable(F); % or whatever function you use to import the filedata
end
"This mean that I should create a table for all different conditions of each one of the ~430 datasets, in order to remember which condition corresponds to which value of `i`."
No, you don't need to "create a table" for that, the structure S already contains all of that information, e.g. for the 2nd file:
S(2).data % gives the imported data
S(2).name % gives the filename (dataset)
"I was hoping to be able to dynamically name the subgroups within the structure in order ot use the `S.dataset_name' format."
Of course you can use dynamic fieldnames:
It will be more complex, fragile, liable to bugs (consider what happens if the filenames contain characters that are not valid in fieldnames) and offers no obvious benefit:
P = 'absolute or relative path to where the files are saved';
S = dir(fullfile(P,'*.txt'));
D = struct();
for k = 1:numel(S)
F = fullfile(P,S(k).name);
[~,N,~] = fileparts(S(k).name);
G = sprintf('complicated_%s',N);
D.(G) = readtable(F); % or whatever function you use to import the filedata
end

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