how i can fix this axes error ?
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Hi
i have popup menu and two axes, one axes show image and another one two show plot, when i write number in edit text than press push button show plot in axes and i have more than one plot but found error when i select next one my code is :
val = get(handles.popup,'Value'); %get currently selected option from menu
str = get(handles.popup,'string');
if val==1
axes(handles.plotaxes);
a = str2num(get(handles.edit1,'String'));
b = str2num(get(handles.edit2,'String'));
n1=length (a)
n2=length (b)
x=0:1:n1-1;
subplot (2, 2, 1), stem(x, a);
title ('INPUT SEQUENCE1');
xlabel ('---->n');
ylabel ('---->a (n)');
y=0:1:n2-1;
subplot (2, 2, 2), stem(y, b);
title ('INPUT SEQUENCE2');
xlabel ('---->n');
ylabel('---->b(n)');
c=conv (a, b);
n3=0:1:n1+n2-2;
subplot (2, 1, 2), stem (n3, c);
title ('CONVOLUTION OF TWO SEQUENCES');
xlabel ('---->n');
ylabel ('---->c (n)')
elseif val==2
a = str2num(get(handles.edit1,'String'));
b = str2num(get(handles.edit2,'String'));
n1=length (a);
n2=length (b);
n3=n1-n2;
N=max (n1, n2);
if (n3>0);
b= b, zeros (1, n1-n2);
n2=length (b);
else
a= a, zeros (1, N-n1);
n1=length (a);
end
k=max (n1, n2);
a=a'; b=b'; c=b;
for i=1: k-1
b=circshift (b, 1);
c=[c, b];
end;
disp(c);
z=c*a;
disp ('z=')
disp (z)
subplot (2, 2, 1);
stem (a,'filled');
title ('INPUT SEQUENCE1');
xlabel ('---->n');
ylabel ('---->Amplitude');
subplot (2, 2, 2);
stem (b,'filled');
title ('INPUT SEQUENCE2');
xlabel ('---->n');
ylabel ('---->Amplitude');
subplot (2, 1, 2);
stem (z,'filled');
title ('CONVOLUTION OF TWO SEQUENCES');
xlabel ('---->n');
ylabel ('---->Amplitude');
end;
this is the error:
Error using axes
Invalid object handle
Error in dspgui>plotbutton_Callback (line 201)
axes(handles.plotaxes);
Error in gui_mainfcn (line 96)
feval(varargin{:});
Error in dspgui (line 42)
gui_mainfcn(gui_State, varargin{:});
Error in @(hObject,eventdata)dspgui('plotbutton_Callback',hObject,eventdata,guidata(hObject))
Error while evaluating uicontrol Callback
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回答(2 个)
Walter Roberson
2013-5-21
subplot() deletes any existing axes that the subplot would cover. So your subplot(2,2,1) deletes the existing axis handles.plotaxes
subplot() applies to figure (or uipanels), not to axes. I don't think you can have axes objects that are children of other axes objects (but maybe it is possible through hggroup, I would have to research.)
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