; hh->Draw("surf") ;  c->cd(2) ; framex->Draw() ;
    c->cd(3) ; framea->Draw()   ;  c->cd(4) ; hhcdf->Draw("surf") ;
  }
</pre>
Plot that results from above macro
<br><br>
<img src="roofit_524_demo.gif" alt="Graphics Output of demo macro">
<br><br>

<h4>Miscellaneous small improvements</h4>
<ul>
<li>Utility function <tt>bindFunction()</tt> and <tt>bindPdf</tt> that can bind
    external C++ functions as RooFit functions or p.d.f.s now can also take
    <tt>ROOT::Math::Functor</tt> objects as input argument