 number <span class="math inline">\(z = x + yi\)</span> is to consider its real part <span class="math inline">\(x\)</span> and imaginary part <span class="math inline">\(y\)</span> to have a bivariate normal distribution. For example, a complex prior can be expressed as follows.</p>
<div class="sourceCode" id="cb8"><pre class="sourceCode stan code-with-copy"><code class="sourceCode stan"><span id="cb8-1"><a href="#cb8-1" aria-hidden="true" tabindex="-1"></a><span class="dt">complex</span> z;</span>
<span i