How to play audio files one by one by pushing the same button in GUI

Hi there! I am new to Matlab and gui especially, please help me! I need to play wav files one by one by pushing a button in gui. My files are in a folder, but I need to play them in a random way. I did permutations to shuffle them (this is because I need to know how exactly they shuffled, to make a statistics). In my opening function I wrote:

% --- Executes just before MYGUI is made visible.
function MYGUI_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% varargin   command line arguments to MYGUI (see VARARGIN)

% Choose default command line output for MYGUI
handles.output = hObject;

handles.status=0;

%inizialize global variable 
global r

FoldData = dir('New Folder');   %Put metadata for folder in variable
FoldIndex = [FoldData.isdir];   %Gets list of files in folder
FileList = {FoldData(~FoldIndex).name}; 
FileList = FileList';               %Transpose resultant row vector into column vector
v = FileList';
P = perms(v);                     %make permutation of verctor v
r = P(9,:)                     %select 10th row (random choice)

   r = 

      'comb3.wav'    'comb2.wav'    'comb4.wav'    'comb1.wav'

In my pushbutton callback (PLAYAUDIObutton) I have:

% --- Executes on button press in PLAYAUDIObutton.
function PLAYAUDIObutton_Callback(hObject, eventdata, handles)
% hObject    handle to PLAYAUDIObutton(see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global r
if handles.status==0
    handles.status=1;
     k = r{1, 1};  %select 1st wav file from 10th row
     [y,Fs]=wavread(k);  %Import and play file
     handles.audio = audioplayer(y,Fs);
     play(handles.audio);

else 
    msgbox ('Test is finished. Thank you for your participation!');
end
guidata(hObject,handles);

But, this code is only for playing the very first audio file from my list (comb3.wav). Now I need to figure out how to play all 4 files one by one by pushing PLAYAUDIOpushbutton: I need to press button and hear comb3.wav, by pushing the same button second time to hear comb2.wav and etc. What function should I choose to play them sequentially? There could be not only 4 files, but around 20... Thank you in advance!!

[Daniel Shub]

Please edit the question to include what have you tried so far and where you are stuck.

[Daniel Shub]

Creating a GUI is very different from creating a function that plays wav files one after the other. You need to focus your question so we can help you solve your problems. You need to edit the question to show where are you stuck. In other words, provide simplified code and a description of what happens when you run the code (e.g., the output or error message) and what you expect to happen and what you would like to happen.

[Lucky]

Thank you, Daniel, now I hope the question is clear?

[John]

hallo everyone can anyone explain to me whats the meaning of handles.status==0??? in what help us????im new to this! thanks???

Answer 1

[Daniel Shub]

If I understand your code correctly, every time you push the button the first file is played, but you want it to step through the list. Assuming you do not need the list for anything else you can chop the first item off the list by adding r = r{2:end}; (obviously with a check to make sure there are at least 2 items) at the end of your PLAYAUDIObutton_Callback function. If you need the list, you could set a new global (or persistent) counter in PLAYAUDIObutton_Callback

[Lucky]

Thank you for the idea! i set global counter and it works.