ass="op">]</span> <span class="op">+</span> <span class="va">pars</span><span class="op">[</span><span class="fl">4</span><span class="op">]</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="fu"><a href="https://rdrr.io/r/base/length.html" class="external-link">length</a></span><span class="op">(</span><span class="va">t.obs</span><span class="op">)</span><span class="op">)</span></span>