</span> in a <span class="math inline">\(K\)</span>-simplex).</p>
<p>Cholesky factors for positive-definite matrices are initialized to 1 on the diagonal and 0 elsewhere; this is because the diagonal is log transformed and the below-diagonal values are unconstrained.</p>
<p>The initial values for other parameters can be determined from the transform that is applied. The transforms are all described in full detail in the <a href="variable-transforms-chapter.html#variable-transforms.chapter">chapter on variab