Yan

Dear Dimitrios,
I have been trying to run your code but it gives me error.
??? Reference to non-existent field 'FeatSelCurve'.

Error in ==> DEMO>OpenDataFile_ClickedCallback at 70
axes(handles.FeatSelCurve);cla reset;

Error in ==> gui_mainfcn at 96
feval(varargin{:});

Error in ==> DEMO at 19
gui_mainfcn(gui_State, varargin{:});

Error in ==> DEMO>OpenDataMenu_Callback at 245
DEMO('OpenDataFile_ClickedCallback',gcbo,[],guidata(gcbo));

Error in ==> gui_mainfcn at 96
feval(varargin{:});

Error in ==> DEMO at 19
gui_mainfcn(gui_State, varargin{:});

??? Error while evaluating uimenu Callback

Can you tell me how to solve it?