MATLAB: How do i obtain a matrix from a gui table to multiply it to another matrix

guideMATLABmatlab gui

I want to enter a matrix through a table and multiply it with another matrix.I am using GUIDE.

now update is a pushbutton

function update_Callback(hObject, eventdata, handles)
global tableData;
tableData = get(handles.vi, 'Data');
*
now vi is the tag of the table*
function pushbutton2_Callback(hObject, eventdata, handles)
a = str2num(tableData);
a = a*r;
set(handles.test,'String',a);
guidata(hObject, handles);
* **now test is a static text.

Here the problem is that MATLAB says tableData is undefined.** *

Please some one help me out with this.

Best Answer

that's because tableData is undefined in pushbutton2_callback.

add global tableData; before a = str2num(tableData). this will make tableData accessible in that function.

Related Solutions

MATLAB: Pushbutton in GUI

I do not know whether you refer to the variables which are executed in pushbutton1 to pass it to pushbutton2 or you want to know that pushbutton1 is pushed so you pass something over to pushbutton2. Either way I will provide you simple examples:

To pass the value of a variable calculated in pushbutton1 to pushbutton2, simply use the global command.

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)



global var1;
x = get(input_x.handles,'Value',str2num());
y = get(input_y.handles,'Value',str2num());
var1 = x*y^2;
guidata(hObject,handles);
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)
global var1;
disp(var1);
guidata(hObject,handles);

If you would like to pass something from pushbutton1 to pushbutton2 when you know pushbutton1 is pushed, simply get the Value from the pushbutton while globalizing the variables you want to pass:-

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)
global var1;
x = get(input_x.handles,'Value',str2num());
y = get(input_y.handles,'Value',str2num());
var1 = x*y^2;
guidata(hObject,handles);
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)
global var1;
if get(handles.pushbutton1,'Value')
    disp(var1);
end
guidata(hObject,handles);

There you go. Try to phrase your questions in a more detailed manner next time.

MATLAB: Pass data from figure to main GUIDE pushbutton callback function

You need to update the hObject handle using,

 guidata(hObject,handles);

Upon edit, save the new table data in this handle,

 hObject.TableData = get(uitableHandle,'Data');

and then in the pushbutton callback use it like,

 plot(hObject.TableData)

read this: https://www.mathworks.com/help/matlab/creating_guis/share-data-among-callbacks.html

Best Answer

Related Solutions

MATLAB: Pushbutton in GUI

MATLAB: Pass data from figure to main GUIDE pushbutton callback function

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