t <span class="math inline">\(\mu\)</span> and/or (positive) multiplier <span class="math inline">\(\sigma\)</span>,
Stan uses an affine transform. Such a variable <span class="math inline">\(X\)</span> is transformed to a new
variable <span class="math inline">\(Y\)</span>, where</p>
<p><span class="math display">\[
Y = \mu + \sigma * X.
\]</span></p>
<p>The default value for the offset <span class="math inline">\(\mu\)</span> is <span class="math inline">\(0\)</span> and for the multiplier <span class="ma