MATLAB: How to pass string value from one callback function to another

passing datavariables

I am typing a code where in one callback function I am browsing for a audio file (.wav) by hitting one pushbutton and setting the filename in one of the edit box (edit6). Now, I want this audio file to be read when I hit the second pushbutton. What command should I use? so that I can read the audio file which i selected and plot its fft and time domain? Here's the code..
% --- Executes on button press in pushbutton7.
function pushbutton7_Callback(hObject, eventdata, handles)
[filename,filepath]= uigetfile({'*.*';'*.wav';'*.m4a'});
fullname = [filepath filename];
set(handles.edit6,'string', filename) ;
% --- Executes on button press in button.
function button_Callback(hObject, eventdata, handles)
% hObject    handle to button (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
data= audioread('C:\Users\Mohanish\Desktop\GA\Project\mohanish.wav');
L= length (data);
Y= fft(data)
P2= abs (Y/L)
P1= P2(1:L/23+1);
P1(2:end-1)= 2*P1(2:end-1)
figure= subplot('position', [0.56, 0.15, 0.4, 0.3]);
K= plot (P1);
title ('Frequency Domain')
xlabel('f(Hz)')
ylabel('|P1(f)|')
hold on
[y,Fs]= audioread('C:\Users\Mohanish\Desktop\GA\Project\mohanish.wav');
t= linspace(0,length(y)/Fs, length(y));
figure1= subplot('position', [0.10, 0.15, 0.4, 0.3]);
plot(t,y);
title ('Time Domain')
xlabel('Time (sec)')
ylabel('Amplitude')

Best Answer

Change
fullname = [filepath filename];
to
fullname = fullfile(filepath, filename);
Change
data= audioread('C:\Users\Mohanish\Desktop\GA\Project\mohanish.wav');
to
fullname = get(handles.edit6, 'string');
if isempty(fullname)
  warndlg('You need to select a file name');
  return;
end
if ~exist(fullname, 'file')
  warndlg(sprintf('Odd, file does not exist, "%s", fullname));
  return;
end
try
  data = audioread(fullname);
catch ME
  warndlg(sprintf('File is not a valid audio file: "%s"', fullname);
  return
end
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