matlab UpdatePreviewWindowFcn

Question

Im using GUIDE to make a matlab GUI which does some video computation. Using the preview function I can preview the live video from my webcam and do some calculations.

In the MainGUI i use the: setappdata(hImage,'UpdatePreviewWindowFcn',mypreview_fcn); to get to a custom preview function which is:

function mypreview_fcn(obj,event,himage)

  originalframe=peekdata(vidobj,1);

   while isempty(originalframe)
    originalframe=peekdata(vidobj,1);
   end


   if kk>=1

       [LogResult,y,dist]=QueryArduino;

        if LogResult==1
            kk=kk+1;

            results{kk,1}=originalframe;
            results{kk,2}=measure1;
            results{kk,3}=measure2;
            results{kk,4}=measure3;
            results{kk,5}=measure4;
            results{kk,6}=measure5;
            results{kk,7}=measure7;
            offset=median([results{:,7}]);
            offset=measure2-measure3;


        end
  end
  set(himage,'CData',originalframe);

  end

I would like to pass the result matrix to a table in the MainGUI How can I access the GUI table;

Answer 1

You could do it using getappdata to pass all the data you want inside MainGUI and populate the table. Actually I don't understand why you would use setappdata to call a function.

For instance, in the function mypreview_fcn you coudl write something like this right before the end of the function:

setappdata(0,'MyData',results);

and then in MainGUI use getappdata :

TableData = getappdata(0,'MyData');
set(HandletoTable,'Data',TableData);

An alternative (and better approach I think) to getappdata would be to assign an output argument to the function mypreview_fcn so that when you call it from mainGUI the variable results is recognized inside mainGUI and you can populate the table simply using

set(HandletoTable,'Data',results);

Is this what you meant?