Load .mat files from subfolders with different names

Hello everyone,

I have Folder1 which contains a number of subfolders with different names (subfolder_1,subfolder_th etc). Each subfolder has 7 .mat files with the same name (data1,data2,....data7). So i've got two questions:

1. Is it feasible somehow to open one subfolder at a time in a for loop in order to process tha data?

2. Is there a way to load for example data1 from all subfolders and then do the same thing for the other data?

*i guess the main problem is the subfolder's name detection and storing.

Answer 1

[Jan]

You can get the list of names of the subfolders easily:

Base = 'C:\Temp';  % adjust to your needs
List = dir(fullfile(Base, '*.*'));
List = List([List.isdir]);
SubFolder = {List.name};
SubFolder(ismember(SubFolder, {'.', '..'})) = [];

You can obtain a list of absolute paths to a specific file name also:

Base  = 'C:\Temp';  % adjust to your needs
List  = dir(fullfile(Base, '**', 'data1.mat'));  % >= Matlab R2016b !!!
Files = fullfile(List.folder, List.name);

Now you can load the data in a loop:

for iFile = 1:numel(Files)
  Data = load(Files{iFile})
  ... process the data
end

[Chris Shortgeorge]

Hello Jan and thanks for your response

First of all, since i' ve got the subfolders' names (First part), how can i have access to the data i want? For example using

for i =1:size(SubFolder,2)
B=SubFolder{i};
load('C:\Temp\...\B\data1.mat');
end

I get the following error Unable to read file 'C:\Temp\...\B\data1.mat'. No such file or directory

Also i ve got Matlab R2015a so is there a way to adjust the second part of the answer?

[ignacio bobadilla tapia]

@Jan Dear I have the same problem, how can I store the files by means of a for loop, since as the subfolders change, the files from the first folder continue to appear, they cannot change. Thanks greetings.