matlab gui error using axes invalid object handle

function spectrograma_Callback(hObject, eventdata, handles)
% hObject    handle to spectrograma (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
%spectrograma primul semnal cu zgomot
a=get(handles.semnal_ideal,'Value')
if a==1   
q=spectrograma_semnal_ideal(0.9)
axes(handles.axes5)
plot3(q(1),q(2),q(3),'r*','MarkerSize',10)
hold on
else   
b=get(handles.zgomot,'String');
zgomot=str2double(b);
  for i=1:50
  [solutii(i,:),output(i)]=spectrograma_semnal_zgomot(0.9,zgomot);
  end 
solutii_bune=find(output==1);
pozitia_sursei=sum(solutii(solutii_bune,:))/size(solutii_bune,2);
axes(handles.axes5)
plot3(pozitia_sursei(1),pozitia_sursei(2),pozitia_sursei(3),'r*','MarkerSize',10);
hold on 
end

I have to make a interface and i'm stuck at this error. This error give me headaches and i can't solve it

 Error using axes
Invalid object handle

can anyone help me?

Answer 1

[Jan]

axes(handles.axes5) fails, if handles.axes5 is not a valid axes object. Where did you create and define it? Has it been deleted? Did you overwrite the field in the handles struct?

[Jessie Bessel]

I plot many graphics on the same figure and i think that is the problem; something is not right. handle.axes5 is a valid axes.

[Jan]

The error message is clear: "Error using axes - Invalid object handle". This means, that the handle is not valid. Use the debugger to check this.

[Jessie Bessel]

What do you think about that? https://www.mathworks.com/matlabcentral/answers/390408-plot-graph-in-gui-why-i-can-plot-a-script-but-i-can-t-plot-a-function?s_tid=prof_contriblnk

[x Wang]

if

axes5

else

axes5

same thing here,how did you fix this.SOS

[Jan]

@x Wang: The code is strange. What do you expect "axes5" to be? A command or variable?

I cannot fix code, if its purpose is unclear and this is not even a valid Matlab syntax.