Plotting in Matlab GUI.

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Franta Cymorek
Franta Cymorek 2017-2-10
评论： Franta Cymorek 2017-2-10
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
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Adam
Adam 2017-2-10
Surely
col = 2;
data = handles.fileData(:,2);
is all you need if your data is loaded in correctly?
Franta Cymorek
Franta Cymorek 2017-2-10
It's still not what I meant, but thanks for your help.

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采纳的回答

Philip G
Philip G 2017-2-10
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.
  1 个评论
Franta Cymorek
Franta Cymorek 2017-2-10
编辑：Franta Cymorek 2017-2-10
By pressing button2, I want to plot the data. Data are stored in an Excel sheet. I want to choose which column will be plotted. Respectivly, in handle.y store the loaded data. Later, in handle.x I want to specify which column.

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