How can i define variables in gui?

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Emre Akinci
Emre Akinci on 6 Jun 2019
Commented: Jan on 7 Jun 2019
Hey everyone I want to define variables like:
function pushbutton15_Callback(hObject, eventdata, handles)
audio = get(handles.listbox1,'String');
file = get(handles.listbox1, 'Value');
audiofile = audioread(audio{file});
and I want to use "audiofile" in math operators.
what I need to do?
  9 Comments
Emre Akinci
Emre Akinci on 7 Jun 2019
Thank you sir, I will try it
Emre Akinci
Emre Akinci on 7 Jun 2019
Can I do that I want with different buttons One button for every variable? Using uigetfile

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Accepted Answer

Jan
Jan on 7 Jun 2019
It depends on what "use "audiofile" in math operators" mean. After your code, audiofile is a variable, which contains the signal of a sound. You can work with this variables as usual - inside this callback. If you want to share the contents of the variable with other callbacks:
function pushbutton15_Callback(hObject, eventdata, handles)
fileName = get(handles.listbox1,'String');
index = get(handles.listbox1, 'Value');
audioSignal = audioread(fileName{index});
handles.audioSignal = audioSignal;
guidata(hObject, handles);
end
function anyOther_Callback(hObject, eventdata, handles)
audioSignal = handles.audioSignal;
... % Do what you like with the signal here
end
I've used more meaningful names for the variables here. The list of files names is not really "audio", and the chosen index is not really "file". The contents of the file is not really "audiofile".
"Can I do that I want with different buttons One button for every variable? Using uigetfile"
Again, it depends on what you want to do. "One button for every variable" is not clear. Of course you can use uigetfile, so which problem do you have with it?
  2 Comments
Emre Akinci
Emre Akinci on 7 Jun 2019
I'm creating a GUI about Independent Component Analysis with audio signals. So I want the user can select any file from ilstbox but I understood I can't because I had to define every listbox item as variable that looks impossible So I will uigetfile and buttons for audiofiles user can select files so i will work on it
Jan
Jan on 7 Jun 2019
I do not understand, why you mean, that listbox items have to be variables. Perhaps this is useful:
...
function YourGUI_OpeningFcn(hObject, EventData, handles)
baseFolder = 'C:\Your\Data\Folder'; % Or uigetdir() ?
fileList = dir(fullfile(baseFolder, '*.wav'));
set(handles.popupmenu1, 'String', {fileList.name});
handles.baseFolder = baseFolder;
guidata(hObject, handles);
end
function pushbutton15_Callback(hObject, eventdata, handles)
fileName = get(handles.listbox1,'String');
index = get(handles.listbox1, 'Value');
audioSignal = audioread(fullfile(handles.baseFolder, fileName{index}));
handles.audioSignal = audioSignal;
guidata(hObject, handles);
end
This populates the popupmenu with the file names contained in the specified folder. You can access these files later on.

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