Read different file in certain category

If I have some file folders, like '19800101', '1980012',... '19801201',... In each file, it have a .mat file. I want to deal with folder according to if their belong to same month. like, .mat file in folder '19800101' and '19800102' should be done with same action.

[per isakson]

"In each file" &nbsp should that be "In each folder"?

[Jason]

Yes. In each folder. Thanks for correction

Answer 1

[Ahmet Cecen]

Grab a list of all the folders in a given month using something like:

files = dir('198001*');

Check MATLAB Regex for more elaborate sub-set extraction schemes you might need later here: http://www.mathworks.com/help/matlab/ref/regexp.html

You can then read all mat files in those folders with a for loop like:

 for k = 1:length(files)
     Data{k} = load([files(k).name,'\nameofmatfileinside.mat']);
 end

This assumes the name of the matfile is the same inside all of those folders, which I suspect is the case. Also the direction of the directory slash might differ based on operating system.

[Jason]

Thanks for reply. What about the name of matfile is different, its name is the folder name, like '19800101.mat'?

[Jason]

I write by myself. I think it is works.

Data{k}=load([files(k).name, '\', files(k).name, '.mat'])

[Jason]

for "files = dir('198001*');" it seems to me I only can create it 12 times since there are 12 months? do you have more efficient way?

[Ahmet Cecen]

Something along the lines of the below should work:

 for i=1:12
    if i<10
        currentrgx = ['19800',num2str(i),'*'];
    else
        currentrgx = ['1980',num2str(i),'*'];
    end
    files = dir(currentrgx);
 end

[Jos (10584)]

No need for an if-statement:

   for i=1:12,
      currentgrx = sprintf('1980%02d*',i)
      % files = dir(currentrgx);
   end

[Ahmet Cecen]

Ooh, nice.

[Jason]

Thanks for providing such efficient algorithm