Why is this variable still undefined in GUI?

Dear all,

I have GUI and I have a problem with variable shape. This error:

Undefined function or variable "shape".

Error in DP_segment_final>pushbutton5_Callback (line 383)
shape.thorax = fourier_fit(fourier_fit(shape.thorax, Ncomps), linspace(0, 1, Npts1));

Error in gui_mainfcn (line 96)
        feval(varargin{:});

Error in DP_segment_final (line 44)
    gui_mainfcn(gui_State, varargin{:});

Error in @(hObject,eventdata)DP_segment_final('pushbutton5_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating uicontrol Callback

I attach my code, figure and my original image. Thank you for your answers.

Answer 1

[Jan]

The variable is properly created some lines above:

tmp = bwboundaries(handles.binaryImage_okoli);
shape.thorax = tmp{1};

But this code is not called, if 'okraje_modelu.mat' is existing. Then:

if 2==exist ('okraje_modelu.mat')
  load ('okraje_modelu')
  disp('Okraje modelù byly naèteny.')

Reading the code you cannot predict, what the load command injects in the workspace. Therefore it is much clearer and safer, to catch the output:

Data  = load ('okraje_modelu');
shape = data.shape;

Then you will get a useful error message in case of a missing variable.

You can use the debugger to examine, what's going on. Set a breakpoint in the first line of the callback and step through the code line by line. Check in the Workspace Browser, of the wanted variable occurres.