I need to know if there are a uitable positions empty in a guide table

I need to know if there are a uitable positions empty in a guide table I've tried with different code like isempty

 datos=get(hObject,'data');
 for i=1:4
 for j=1:4
      s=datos(i,j);
     if(isempty(s))
        display('no value');
     else
           display(datos());
     end
 end
 end

Answer 1

[Walter Roberson]

Change

display(datos());

to

fprintf('datos(%d, %d) is\n', i, j);
display(s);