MATLAB: Plotting in Matlab GUI.

excelMATLABmatlab guiplotting

I am working on a GUI in Matlab. I have an axes there, and two buttons. Pushing the button1 I load an Excel sheet in it (Contains 3 columns and various number of rows – always). I need to store the data in a variable, then pressing button2 I want to plot the data (I want to be able to specify which column will be plotted). I'm struggelling with passing the data insine button1 to a variable. Could you please give me a hint?
This is the code:
    % --- Executes on button press in pushbutton1.
function pushbutton1_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB

% handles    structure with handles and user data (see GUIDATA)

 [filename, pathname] = uigetfile('MultiSelect','on');
 if isequal(filename,0) || isequal(pathname,0)
    return
end
guidata(hObject, handles);
 fullpathname = strcat(pathname, filename);
 set(handles.text3,'String', fullpathname);
 fileID = fopen(strcat(pathname, filename), 'r'); % read-only permission
 handles.fileData = fscanf(fileID,'%d');
 handles = guidata(hObject);
 handles.y = 'HERE I WANT TO STORE THE DATA.';
 guidata(hObject, handles);
 % --- Executes on button press in pushbutton2.
 function pushbutton2_Callback(hObject, eventdata, handles)
 % hObject    handle to pushbutton2 (see GCBO)
 % eventdata  reserved - to be defined in a future version of MATLAB
 % handles    structure with handles and user data (see GUIDATA)
 handles = guidata(hObject);
 handles.x = handles.y
 guidata(hObject, handles);
 plot(handles.x);
 grid on

Best Answer

Hi, the approach using guidata to store and retrieve data is correct. The general structure should be like
function dataimport_Callback(hObject, eventdata, handles)
x = 0:100;
y = -100:0;
handles.x =x;
handles.y =y;
guidata(hObject, handles) % here you store x and y in "handles"
function drawing_Callback(hObject, eventdata, handles)
plot(handles.x,handles.y)
What problem are you having exactly? With the above workflow using guidata(hObject) to retrieve data and guidata(hObject, handles) to store data in handles you should be good to go.
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