MATLAB: Error using patch Vectors must be the same lengths.

urgent

function popupmenu7_Callback(hObject, eventdata, handles)
% hObject    handle to popupmenu7 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% Hints: contents = cellstr(get(hObject,'String')) returns popupmenu7 contents as cell array
%        contents{get(hObject,'Value')} returns selected item from popupmenu7
v=get(handles.popupmenu7,'Value')
if v == 1
   X1=get(handles.edit1, 'String');
   X2=get(handles.edit4,  'String');
   X3=get(handles.edit7,  'String');
   X4=get(handles.edit10,  'String');
   Z=[X1 X2 X3 X4]
elseif v == 2
   Y1=get(handles.edit2,  'String');
   Y2=get(handles.edit5,  'String');
   Y3=get(handles.edit8,  'String');
   Y4=get(handles.edit11, 'String');
   Z=[Y1 Y2 Y3 Y4]
elseif v == 3
   Z1=get(handles.edit3,  'String');
   Z2=get(handles.edit6,  'String');
   Z3=get(handles.edit9,  'String');
   Z4=get(handles.edit12, 'String');
   Z=[Z1 Z2 Z3 Z4]
end
image=uigetfile('*.png', 'File Selector');
imshow(image)
axes=handles.axes1;
hold on;
maxAllowablePoints = 5; % Whatever you want.
numPointsClicked = 0;
promptMessage = sprintf('Left click up to %d points.\nRight click when done.', maxAllowablePoints);
titleBarCaption = 'Continue?';
button = questdlg(promptMessage, titleBarCaption, 'Continue', 'Cancel', 'Continue');
if strcmpi(button, 'Cancel')
  return;
end
while numPointsClicked < maxAllowablePoints
  numPointsClicked = numPointsClicked + 1;
  [x(numPointsClicked), y(numPointsClicked), button] = ginput(1)  
  if button == 3
    % Exit loop if
    break;
  end
end
% Print to command window
x
y
Z
msgbox('Done collecting points');
patch(handles.axes1, x,y,Z, 'Facecolor', 'interp')
hold off
i am using this code to plot on the image but getting error as follows
Error using patch
Vectors must be the same lengths.
Error in imgplt3d>popupmenu7_Callback (line 643)
patch(handles.axes1, x,y,Z, 'Facecolor', 'interp')
Error in gui_mainfcn (line 96)
        feval(varargin{:});
Error in imgplt3d (line 42)
    gui_mainfcn(gui_State, varargin{:});
Error in @(hObject,eventdata)imgplt3d('popupmenu7_Callback',hObject,eventdata,guidata(hObject))
 
Error while evaluating uicontrol Callback
please help me

Best Answer

The problem is very simple: you never actually convert the string data to numeric.
Replace all of your Z definitions with this:
Z = str2double({X1,X2,X3,X4});
You will also need to pay attention that x and y have the same number of elements as Z, or otherwise have permitted sizes according to the patch documentation (your code does not do this).
Related Question