L()</tt>.

<p>To promote the consistency of this interface, a similar method <tt>RooAbsReal::createChi2()</tt>
has been added to construct chi-squared functions of a dataset and a function or p.d.f.

<p>Along the same lines, it is recommended to use <tt>RooAbsReal::createProfile()</tt> rather
than constructing a <tt>RooProfileLL</tt> object directly as the former will efficiently
recast a profile of a profile into a single profile object.

<h4>Multivariate Gaussian modeling of parameters estimates from a fi