Plotting in Matlab GUI.

Question

Franta Cymorek 2017-2-10

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/324396-plotting-in-matlab-gui

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 2017-2-10

在 MATLAB Online 中打开

Surely

col = 2;
data = handles.fileData(:,2);

is all you need if your data is loaded in correctly?

Franta Cymorek 2017-2-10

It's still not what I meant, but thanks for your help.

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Answer 1

Philip G 2017-2-10

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/324396-plotting-in-matlab-gui#answer_254240

在 MATLAB Online 中打开

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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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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