the Hessian with option partialH.  If not,
the program should be run again with other initial values, with a higher
maximum number of iterations or less strict convergence tolerances.</p>
    </div>
    <div class="section level2">
    <h2 id="references">References<a class="anchor" aria-label="anchor" href="#references"></a></h2>
    <p>Proust-Lima C, Philipps V, Liquet B (2017). Estimation of Extended Mixed
Models Using Latent Classes and Latent Processes: The R Package lcmm.
Journal of Statistical Softwa