Display Graph using checkbox

Question

Sandy Baha 2016-3-31

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评论： Sandy Baha 2016-4-18

I have GUI with pushbutton and checkboxes, by pushbutton i am importing multiple excel files.Now i want to plot different graphs(from imported excel files) using different checkboxes,,if i click one check box it should display the graph and when uncheck graph should disappear. Please do the needful.

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Sandy Baha 2016-4-15

编辑：Sandy Baha 2016-4-15

在 MATLAB Online 中打开

Hello Jan, Sorry for late reply, by using below code i am able to plot only one plot, it is not working for multiple files, please help

if true
 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)
[fileList, folder] = uigetfile('*.csv',
                             'Find the File to Import',   
                             'Multiselect', 'on')
fileList = cellstr(fileList);          
for k = 1:length(fileList);
baseFileName = fileList{k}
fullFileName = fullfile(folder, baseFileName);
fprintf(1, 'Now reading %s\n', fullFileName);
[numbers,txt,raw] = xlsread(fullFileName);
assignin('base', 'my_file', numbers)
assignin('base', 'a', numbers(6,:))
assignin('base', 'b', numbers(7,:))
assignin('base', 'c', numbers(8,:))
a = numbers(6,:) 
b = numbers(7,:) 
c = numbers(8,:)
d = numbers(10,:)
fullFileName = fullfile(folder, baseFileName);
fprintf(1, 'Now reading %s\n', fullFileName);
[numbers,txt,raw] = xlsread(fullFileName);
function checkbox1_Callback(hObject, eventdata, handles)
% hObject    handle to checkbox1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
         CheckBoxChecked(handles);
         function CheckBoxChecked(handles)
          if get(handles.checkbox1,'Value')
          hold on
          figure(1);
          aa =  evalin('base','a');
          bb =  evalin('base','b');
          plot( aa,bb,'*--','DisplayName',baseFileName);
          grid on;
          end
function checkbox2_Callback(hObject, eventdata, handles)
% hObject    handle to checkbox2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
           CheckBoxChecked(handles);
           function CheckBoxChecked(handles)
           if get(handles.checkbox2,'Value')
          hold on
          figure(2);
          aa =  evalin('base','a');
          cc =  evalin('base','c')
          plot( a,c,'*--','DisplayName',baseFileName);
          grid on;
          end
% Hint: get(hObject,'Value') returns toggle state of Torque
end

Adam 2016-4-15

Well, the code in your pushbutton keeps overwriting the same variables so the previous data gets lost.

You really shouldn't be using things like assignin and evalin in a GUI. GUI functions have their own workspace and methods for sharing data amongst those workspaces, most simply by attaching the data to the handles structure. Pinging variables into the base workspace makes it that much harder to work with them.

If you want to retain data previously loaded though you will need to use arrays to store the data and append to those arrays when you load the next data rather than overwriting them. How you do that rather depends on the exact nature of the data you are storing. If it can be of variable size then use a cell array, if the data you will load into e.g. 'a' in your code will always be the same size then you can use a numeric array with dimensionality 1 higher than the data you currently store in 'a'.

Sandy Baha 2016-4-15

Thanks Adam for valuable suggestion, but i am very new in Matlab GUI, i dont know about GUI workspace, if possible may you please provide some example. Thanks

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Answer 1

Geoff Hayes 2016-4-16

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/276328-display-graph-using-checkbox#answer_218187

在 MATLAB Online 中打开

Sandy - where is your data being drawn to? Does your GUI have an axes that you are plotting the data to or are you creating a new figure for each checkbox? The latter seems to be true with your calls to figure(1) and figure(2). Why not draw both to figure(1) or add an axes to your GUI so that all data is drawn directory to that axes?

Since you wish to remove the drawn data when the checkbox is unchecked, you will need to save the graphics object handle (for each drawn object) to your handles structure so that you can then delete it. For example,

 function checkbox1_Callback(hObject, eventdata, handles)
 if get(handles.checkbox1,'Value')
     figure(1);
     aa =  evalin('base','a');
     bb =  evalin('base','b');
     handles.hCbox1Plot = plot( aa,bb,'*--','DisplayName',baseFileName);
     grid on;
     hold on;
     guidata(hObject,handles);  % do this to save the updated handles structure
 else
     if ~isempty(handles.hCbox1Plot)
         delete(handles.hCbox1Plot);
     end
 end

And as Adam commented, try not to pollute the workspace with your variables. Save them to the handles structure like we did in the above with the handle to the graphics object plotted in the checkbox1_Callback.

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Sandy Baha 2016-4-18

Thanks Geoff for your valuable suggestion, for single file import it is plotting the result after selecting checkbox but for multiple file import it is just overwriting the values. Also i have used guidata(hObject,handles) but still not getting the required results.

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Display Graph using checkbox

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