Reading files from a directory

I have a code which cuts audio signal (.wav) into segments written in .txt files. My current code works only with one audio signal, and matching text file. But I need to adjust the code to work with more files. I have two directories; one for .wav files and one for text files which both include more than one file. I need to write the code which reads one by one audio and text file and cuts the audio segment. The code below works with one audio file and one text file.

%read audiofile
[data,Fs] = audioread('sz08010103404.wav'); 

%read text file with segments
list_zv = fopen('intervali_zvucni_sek.txt','r');
C_zv=cell(size(list_zv)) %put every interval int it's own cell

 %signal
N = length(data);
totaldur = N/Fs; % total duration
t = linspace(0,totaldur,N); % create a time vector

 for k=1:length(list_zv)
    content_zv = fgets(list_zv(k)) %gets every part of the list
    d_zv= strsplit(content_zv,',')% splits str at the delimiters specified by delimiter

Z=[] %for results
  for n=1:length(d_zv) 
          y=d_zv{n} 
          z= strsplit(y,' ') %split the content of current cell
          start=z{1} %get the first part of the cell 
          stop=z{2} %get the second part of the cell
          start1 = str2num(start) %turn into numeric 
          stop1 = str2num(stop)
          B(n,1:2) = [start1,stop1];%test matrix

 %             cut the signal 
                seg1 = data(t>start1 & t<stop1)
                sound(seg1)

               ZV{n}=seg1 %put the signal into the matrix
    end
end

I tried to open all the files from the directory by using dir function, what I managed to do, but I can't get the contents from text file to read it. Every text file looks like this; 0.205000 0.220000 ,0.23500 0.265000 ,...

Code:

 FileList = dir('ODOGS/segments'); %folder with text files for segments
 N = size(FileList,1);

 FileList_wav = dir('ODOGS/WAV'); %folder with audio files
 N_w = size(FileList_wav,1);

 for k = 1:N   
   filename = FileList(k).name % get the file name 

   for x = 1:N_w
       filename_w = FileList_wav(x).name
       disp(filename_w)

       if filename(k) == filename_w(x) %audio file and text file need to have the same name
           %do the rest of the code

       end
    end
end

Answer 1

[Stephen23]

How to read multiple files is explained extensively in the documentation, on this forum, and in the wiki:

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

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

http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

etc

The first thing to decide is if you want to generate the file names, or if you want to read the names of existing files:

• generate names: use sprintf and fullfile.
• read names: use dir and fullfile.

You can also find some examples with my FEX submission natsortfiles:

http://www.mathworks.com/matlabcentral/fileexchange/47434-natural-order-filename-sort

[Lara Lirnow]

I used dir for reading first and then fullfile. Thank you, your links with examples helped a lot.