MATLAB: Opening folders and read its information

folders

I'm new to the field of creating or opening folders from a script. I have tried many things and I always get "the file was not found".

This is my main director (C:\Deterministic\New Objectives) where 8 sub-folders are located and their names are:

Normal_4000_M
Normal_4000_M_2S
Normal_4000_M_S
Normal_4000_M+2S
Normal_4000_M+S
Normal_4000_P10
Normal_4000_P50
Normal_4000_p90

I want to access each folder and load its 'NPV_v_0.15.mat' and save it in a vector which is called RESULT.

Anyone can help please and thanks in advanced.

Best Answer

This should get you started:

D = 'C:\Deterministic\New Objectives';
S = dir(fullfile(D,'Normal_4000*'));
N = {S([S.isdir]).name};
C = cell(1,numel(N));
for k = 1:numel(N)
    C{k} = load(fullfile(D,N{k},'NPV_v_0.15.mat'));
end

Your data will be in the cell array C. The folder names are listed in cell array N. If every .mat contains the same variables then you could easily concatenate them into one non-scalar structure:

T = [C{:}];

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

https://www.mathworks.com/help/matlab/matlab_prog/comma-separated-lists.html

Related Solutions

MATLAB: How to create a loop that runs a function and save output through subfolders in a directory

I replicated your file structure as I understood your explanation, it looks like this:

Obviously I do not have your data files, so I just filled the S# folders with a few CSV files to test this code with. You will need to adapt the code to suit your exact needs and file structure! Also note that if you want the files imported in alphanumeric order then one solution is to download my FEX submission natsortfiles and replace all of the instances of

setdiff(...)

with

natsortfiles(setdiff(...))

Note that the data Phases_I, etc. are collected into the non-scalar structure S3:

https://www.mathworks.com/help/matlab/matlab_prog/access-multiple-elements-of-a-nonscalar-struct-array.html

All folders with names starting with P or S located in the relevant subdirectories are processed.

D = 'C:\Users\stephen.cobeldick\Desktop\Project\TD';
S1 = dir(fullfile(D,'P*'));
C1 = setdiff({S1([S1.isdir]).name},{'.','..'});
for k1 = 1:numel(C1) % loop over P# directories
    S2 = dir(fullfile(D,C1{k1},'S*'));
    C2 = setdiff({S2([S2.isdir]).name},{'.','..'});
    for k2 = 1:numel(C2) % loop over S# directories
        S3 = dir(fullfile(D,C1{k1},C2{k2},'*.c3d'));
        for k3 = 1:numel(S3) % loop over files
            F = fullfile(D,C1{k1},C2{k2},S3(k3).name);
            M = csvread(F);
            ... do whatever with your data
%           S3(k3).Phases_I = Times_Tot_I;
%           S3(k3).Phases_O = Times_Tot_O;
%           S3(k3).GR_I = GR_Tot_I;
%           S3(k3).GR_O = GR_Tot_O;
        end
%       Phases_I = vertcat(S3.Phases_I); % See note about NATSORTFILES and file order!
%       Phases_I = vertcat(S3.Phases_O);
%       GR_I = vertcat(S3.GR_I);
%       GR_I = vertcat(S3.GR_O);
%       do whatver with those variables...
        % plot, save, etc.
        % Make new subdirectory:
        new = fullfile(D,[C1{k1},C2{k2}]);
        mkdir(new)
%       saveas(fgh,fullfile(new,'image.png'))
    end
end

MATLAB: Running an m-file in each subfolders

I just updated the code and it is working now thanks.

run(fullfile(folder,nFile{k},'TESTING_4000.m'));

Best Answer

Related Solutions

MATLAB: How to create a loop that runs a function and save output through subfolders in a directory

MATLAB: Running an m-file in each subfolders

Related Question