n class="cn">TRUE</span> <span class="op">)</span></span>
<span><span class="va">phi</span> <span class="op">&lt;-</span> <span class="va">phi</span> <span class="op">+</span> <span class="fu"><a href="https://rdrr.io/r/stats/Normal.html" class="external-link">rnorm</a></span><span class="op">(</span> <span class="va">phi</span>, sd<span class="op">=</span><span class="fl">.3</span> <span class="op">)</span></span>
<span><span class="va">phi</span> <span class="op">&lt;-</span> <span class="va">phi</span> <