Error with set(handle​s.text1,'S​tring','te​st') at GUI

Hello,

I'm working on some GUIs and I use the set(handles.anything,...) command often. Today when I opened Matlab and tried to work on the project, I get errors evertime, a line occurs, using the syntax 'handles.anything'. The notion is: "Attempt to reference field of non-structure array." The error is not limited to a certain command. I reduced the problem to a blank gui, inserting a text field and a button. By clicking the button, one command works fine (this uses 'gcf'), the other one fails:

set(handles.text1,'String','anything');

Thank you for your help.

Ferdinand

[Friedrich]

Can you post the gui code from your example?

[Ferdinand Trommsdorff]

Of course, but this is mainly the automatically generated GUI by Guide. I deleted all out commented lines.

The only change is done at "function pushbutton1_Callback".

function varargout = test_gui(varargin)
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', @test_gui_OpeningFcn, ...
'gui_OutputFcn', @test_gui_OutputFcn, ...
'gui_LayoutFcn', [] , ...
'gui_Callback', []);
if nargin && ischar(varargin{1})
gui_State.gui_Callback = str2func(varargin{1});
end
if nargout
[varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
gui_mainfcn(gui_State, varargin{:});
end
function test_gui_OpeningFcn(hObject, eventdata, handles, varargin)
handles.output = hObject;
guidata(hObject, handles);
function varargout = test_gui_OutputFcn(hObject, eventdata, handles)
varargout{1} = handles.output;
function pushbutton1_Callback(hObject, eventdata, handles)
display Goodbye
f=get(gcf,'Position');
set(gcf,'Position',[f(1)*rand f(2)*rand f(3) f(4)]);
set(handles.text1,'String','CHANGED TEXT'); 

[Jakob Sørensen]

Have you written it inside the initialization code?

Because if you look at the comment in the beginning of that section, that could be the problem.

[Ferdinand Trommsdorff]

I didn't wrote it into the initialization. The format here is not very clear.

In the meantime, I recognized the following: if I run the m-file, the GUI works. If I run the figure, which belongs to the GUI, the error is produced.

I think, this is it. Just run the name of the file and not the figure itself.

[Mohamed Samir]

Error in ==> ImageCompression1>pushbutton1_Callback at 91

set(handles.text7,'string',Size);

[Walter Roberson]

There would have been more to the error message than that?

Answer 1

[Carlos Andres Ramiez Irene]

% ---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)
syms x;
ingreso=char(inputdlg('ingrese funcion'));
f=inline(ingreso);
n=str2double(inputdlg('ingrese numero de expresiones para la serie'));
ev=taylor(f(x),'order',n)
fun=string(ev);
set(handles.text1,'string',fun);

% me sale este error Not enough input arguments.

%Error in pushbutton1_Callback (line 12)
%set(handles.text1,'string',fun);