axes problem in MATLAB gui

Question

Neo 2012-9-15

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/48256-axes-problem-in-matlab-gui

评论： Adam 2014-8-21

 Error using ==> axes
Invalid object handle

Error in ==> final>pushbutton14_Callback at 1030 axes(handles.axes1);

WHen i first run the program it worked. But when i click it again, the error appeared? How can i solve this problem?

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Neo 2012-9-16

在 MATLAB Online 中打开

I have problems when i use the command axes(handles.axes1) in may whole program not only on the pushbutton14. Here's my code function pushbutton14_Callback(hObject, eventdata, handles) global g;

rp = str2num(get(handles.rippass,'String'));

rs = str2num(get(handles.ripstop,'String'));

Fc1 = str2double(get(handles.CUTOFF,'String'))

Fc2=str2double(get(handles.CUTOFF2,'String'))

wn=(Fc1/(0.5*g))

wn2=(Fc2/(0.5*g))

type3=get(handles.filter3,'Value');

switch type3

    case 1
        type='low';
    case 2
        type='high';
    case 3
        type='bandpass';
    case 4
        type='stop';

end

filtertype = get(handles.filter2, 'Value');

switch filtertype

    case 1
        [n,Wn]=buttord(wn,wn2,rp,rs);
        [B,A]=butter(n,Wn,type);
    case 2
        [n, Wp] = cheb1ord(wn, wn2, rp, rs);
        [B,A]= cheby1(n,rp,Wp,type);
    case 3
        [n, Ws] = cheb2ord(wn, wn2, rp, rs);
        [B,A]= cheby2(n,rs,Ws,type);

end

load voice;

load voice2;

load voice3;

load voice4;

fsignal1=filter(B,A,voice);

fsignal2=filter(B,A,voice2);

fsignal3=filter(B,A,voice3);

fsignal4=filter(B,A,voice4);

axes(handles.axes1);

plot(fsignal1);

axes(handles.axes2);

plot(fsignal2);

axes(handles.axes3);

plot(fsignal3);

axes(handles.axes4);

plot(fsignal4);

Juan David Cano-Moreno 2014-8-21

编辑：Juan David Cano-Moreno 2014-8-21

在 MATLAB Online 中打开

The problem using axes(handles.axes1) is that Matlab sometimes loose this reference. You can remind them, using an expression like:

if true
  % code
end
axes(handles.axes1)
plot(x,y);% Also with subplots
handles.axes1=gca;

Regards.

Adam 2014-8-21

Is axes1 embedded in your GUI or is it one you spawned earlier and stored in the handles structure?

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Answer 1

Jan 2012-9-15

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/48256-axes-problem-in-matlab-gui#answer_58965

在 MATLAB Online 中打开

Either handles.axes1 is replaced by an invalid handle, or the corresponding axes object has been deleted. Use the debugger to find out more details, e.g.:

dbstop if error

Then run the function again. Matlab stops when the error occurs, such that you can inspect the value of handles.axes1 manually. If the problem is the deleting of the axes object, check the code until you find the corresponding command - perhaps a clf?