Do you speak Matlab ? GazeAlyze toolbox problem [Help]

Hello, I am a food engineeRing student, forced to use Matlab for an eye tracking study I'm performing. Unfortunately, I am not familiar at all with the Matlab language, and I have a few trouble doing my work. My purpose is to plot heatmaps/fixation maps from eye tracking data, but I have been trying a lot of solutions that ended up not working : OGAMA, Viewpoint Toolbox, Psychtoolbox, iMap. I believe it's because of my lack of knowledge of the Matlab environment. However, I can launch one of these toolboxes : GazeAlyze (<http://gazealyze.sourceforge.net/)>, but I get the same error message even if I tried it on R2009a, R2012a & R2013a versions. Here is it:

_Reference to non-existent field 'codes'.

Error in GA_controler (line 74)
              eval(['codes = sort(unique([' eye.cond.start.codes ']));']);

Error in GA_gui_main>Menu3_2_Run_Callback (line 857)
GA_controler('import',handles.data.eye)

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

Error in GA_gui_main (line 42)
      gui_mainfcn(gui_State, varargin{:});

Error in
@(hObject,eventdata)GA_gui_main('Menu3_2_Run_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating uimenu Callback "

Un clic sur "generate heatmaps" dans gazealyze renvoie le message  
suivant dans le console de Matlab :

" Reference to non-existent field 'subjects'.

Error in GA_heatmap (line 80)
          if ~isempty(heat.subjects)

Error in GA_controler (line 588)
      GA_heatmap();

Error in GA_gui_main>Menu11_4_HM_run_Callback (line 1161)
GA_controler('heatmaps',handles.data.eye)

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

Error in GA_gui_main (line 42)
      gui_mainfcn(gui_State, varargin{:});

Error in
@(hObject,eventdata)GA_gui_main('Menu11_4_HM_run_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating uimenu Callback
_

I hope you could help me with the interpretation of this message.

Thank you.

Best regards.

[Jan]

Who has written this ugly piece of code? The eval is such useless that the author forgot to catch such errors.

[Anas]

lol that's rude ! how would you make it better then ? or at least, make it work :)

 thanks !

[Anas]

Here is a link for more details about the issue, if that ever interests you : GazeAlyze forum post

have a good day !

 Anas

[Jan]

You can replace:

eval(['codes = sort(unique([' eye.cond.start.codes ']));']);

by:

codes = sort(unique([XYZ]));

Now XYZ depends on the contents of eye.cond.start.codes. It is a general problem of such EVALing, that the purpose of the code does is not clear anymore. Therefore it is recommended to avoid EVAL in every case.

Answer 1

[Dan]

I assume this is not longer a concern to this fella - but I solved a similar problem for myself and I think someone someday will appreciate me posting about it.

using ogama - 1)after you run your trials go to the statistics module ( a picture of a graph with a red line through it at the top ) . 2) then select what ever data you are interested in ( click the check boxes ). 3)and finally click on export statistics table to file ( its an icon at the second to top bar ).

Then you can read the table into matlab easily and go wild from there . good luck :)