Matlab Error, Non-existent field, axes properties.
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hello,...
i've got some home work n' i'm working with 2 axes (axes1, axes2), 2 push button (browse1, browse2) made by guide... when i push the button, i want to put an image to each axes (browse1 for axes1, browse2 for axes2) i've done it but i got some error
here's my code:
% --- Executes on button press in browse1.
function browse1_Callback(hObject, eventdata, handles)
[FileName,PathName] = uigetfile('*.jpg;*.png;*.tiff;','Select file');
if(FileName~=0)
axes(handles.axes1)
handles.gambar=imread(fullfile(PathName, FileName));
image(handles.gambar)
axis off
else
return
end
guidata(hObject, handles);
% --- Executes on button press in browse2.
function browse2_Callback(hObject, eventdata, handles)
[FileName,PathName] = uigetfile('*.jpg;*.png;*.tiff;','Select file');
if (FileName~=0
axes(handles.axes2)
handles.gambar=imread(fullfile(PathName, FileName));
image(handles.gambar)
axis off
else
return
end
guidata(hObject, handles);
and the generated error:
??? Reference to non-existent field 'axes2'.
error in line 107 => axes(handles.axes2)
i thought, it's because handles cannot read existence of axes2, i have checked it in property insp. but i still don't know what is the problem.... is there some properties of axes2 i missed??
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Réponse acceptée
Chandra Kurniawan
le 14 Jan 2012
Hi,
in the pushbutton1 callback you should write :
function browse1_Callback(hObject, eventdata, handles)
handles.output = hObject;
[FileName,PathName] = uigetfile('*.jpg;*.png;*.tiff;','Select file');
if(FileName~=0)
axes(handles.axes1)
handles.gambar=imread(fullfile(PathName, FileName));
image(handles.gambar)
axis off
else
return
end
guidata(hObject, handles);
in the pushbutton2 callback you should write :
function browse2_Callback(hObject, eventdata, handles)
handles.output = hObject;
[FileName,PathName] = uigetfile('*.jpg;*.png;*.tiff;','Select file');
if (FileName~=0)
axes(handles.axes2)
handles.gambar=imread(fullfile(PathName, FileName));
image(handles.gambar)
axis off
else
return
end
guidata(hObject, handles);
5 commentaires
Plus de réponses (1)
Jan
le 14 Jan 2012
Obviously axes2 is not a field of handles. Most likely you've created the button's callback before the axes2-object. Then updating the handles dynamically would be a solution:
% --- Executes on button press in browse2.
function browse2_Callback(hObject, eventdata, handles)
[FileName,PathName] = uigetfile('*.jpg;*.png;*.tiff;','Select file');
handles = guidata(hObject); % Update
if ischar(FileName) % Better than FileName~=0 !
axes(handles.axes2)
...
"if FileName~=0" works, but is not smart: Internally this is equivalent to:
if all(FileName ~= char(0)) & ~isempty(FileName)
So better use "ischar(FileName)" or "isequal(FileName, 0)".
3 commentaires
Walter Roberson
le 14 Jan 2012
It appears that randy is using GUIDE. The callbacks generated by GUIDE automatically fetch the most-recently-updated version of guidata, so Jan's guidata() solution would not be expected to help.
We have not seen enough code to know that axes2 really exists.
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