Loading files from subfolders, the file name in all the folders are same but with different data.

I am trying to combine results from a simulation. The simulation results file contains 40 sub folders and the files in all the folders are same but with different data. Example my first folder contains files file1,file2,file3,....,file 30. Every other sub folders also contain files with same name. Now I need to load the data of file1 from all the folders. Can someone help me out regarding this?

[Stephen23]

Start by reading the MATLAB documentation:

https://www.mathworks.com/help/matlab/import_export/process-a-sequence-of-files.html

And this:

https://www.mathworks.com/matlabcentral/answers/57446-faq-how-can-i-process-a-sequence-of-files?

[Rik]

Starting from R2016b, you can use dir with path wildcards, otherwise you will have to use dir to generate the list of folders.

Answer 1

[Image Analyst]

See attached demo to process files in a folder and all its subfolders..

Answer 2

[Walter Roberson]

 projectdir = '.';    %name directory that has the subfolders in it
 dinfo = dir(projectdir);
 dinfo(~[dinfo.isdir]) = [];  %remove non-directories
 dinfo(ismember({dinfo.name}, {'.', '..'})) = [];  %remove . and .. directories
 foldernames = fullfile(projectdir, {dinfo.name});
 numfolder = length(foldernames);

 MaxFile = 30;
 data_by_file = cell(MaxFile, 1);

 for K = 1 : MaxFile
   thisfile = sprintf('file%d', K);
   instance_names = fullfile(foldernames, thisfile);
   data_for_this_name = [];
   for F = 1 : numfolder
     data_for_this_instance = LoadInData( instance_names{F} );   %do whatever to load data
     data_for_this_name = [data_for_this_name; data_for_this_instance];
   end
   data_by_file{K} = data_for_this_name;
 end

[Parthiban C]

Thanks for your help Walter. I have a question in this. For example if I am searching for file1 in all the sub folders where we are mentioning that?

[Walter Roberson]

 for K = 1 : MaxFile
   thisfile = sprintf('file%d', K);

that causes iteration over file1, file2, file3, etc.

The data for file1 will put together and stored into data_by_file{1}, for file2 will be in data_by_file{2} and so on.