 A common occurrence of that situation is a (circular) convolution a polar
angle theta, for a p.d.f. that is ultimately expressed in terms of cos(theta).
A new tutorial macro <tt>rf210_angularconv</tt> illustrates how to convolutions of angular observable
with or without an optional cosine transformation for the final observable.
</ul>


<br><br>
   <img src="roofit_524_convolution.gif" alt="Graphics Output of macro rf210_angularconv">
<br><br>



<h4>Option for improved calculation of errors in weighted li