how to write change directories and run the m file in related directory from the the top level folder?

Dear All,

I am still trying to figure how to do with my problem. Still struggling without any significant Improvement. Well I decide to rephrase my question in order to make it more understandable.

I have a folder which name is Main. in this folder I have 10 subfolders whose names are 1 through 10.in each subfolder there is only one m file. this m file performs calculations on the text files in each subfolder.

I need to have a code located in my main folder which iteratively changes the path to each subfoledr and run the m file located in that subfolder. Of course the output files of the m file should be dumped out in the same subfolder as the m file exists.

This will save much time of me. Thanks in advance.

Best

HRJ

[Walter Roberson]

Duplicates http://uk.mathworks.com/matlabcentral/answers/238098-how-to-change-the-directory-in-the-middle-of-a-code and should be merged into there

[Homayoon]

The answer written there, does not run the m file.

[Walter Roberson]

That is not a reason to create a new Question. If someone's answer does not meet your needs then clarify your needs without writing a new Question.

Answer 1

[Homayoon]

   for f=1:10;
   somefolder=sprintf('%s%d%s','C:/Users/Desktop/New folder/00', f, '/');
   cd (somefolder);
   run H2Evolution.m

   end

Answer 2

[Walter Roberson]

projectDir = 'Main';
maxdir = 10;

if ~exist(projectDir, 'dir')
  error('top level directory not found');
end

startdir = cd();

for FolderNumber = 1 : maxdir
  cd(projectDir);

    foldername = sprintf('%d', FolderNumber);
    if ~exist(foldername, 'dir')
      warning(sprintf('Subdirectory not found: %s', foldername));
      continue
    end

    cd(foldername);

    WhateverTheOneMFileNameIsGoesHere;
  end

cd(startdir);

[Homayoon]

Dear Walter,

The code successfully run for the first folder, however for the second iteration and the second folder thiss error shows up:

   Undefined function or variable 'projectDir'.

   Error in Untitled (line 9)
  cd(projectDir);

[Homayoon]

however, it is fixed once i replace projdir by the directory path itself

[Walter Roberson]

startdir = cd();
projectDirName = 'Main';
projectDir = fullfile(startdir projectDirName);

maxdir = 10;

if ~exist(projectDir, 'dir')
  error('top level directory not found');
end

for FolderNumber = 1 : maxdir
  cd(projectDir);

      foldername = sprintf('%d', FolderNumber);
      if ~exist(foldername, 'dir')
        warning(sprintf('Subdirectory not found: %s', foldername));
        continue
      end

      cd(foldername);

      H2Evolution;
    end

cd(startdir);