="op">*</span><span class="va">dt.sim</span> <span class="op">+</span> <span class="va">pars</span><span class="op">[</span><span class="fl">3</span><span class="op">]</span><span class="op">*</span><span class="va">dw</span><span class="op">[</span><span class="va">i</span><span class="op">]</span></span>
<span><span class="op">}</span></span>
<span></span>
<span><span class="co"># Extract observations and add noise</span></span>
<span><span class="va">dt.obs</span> <span class="op">=</span> <span class="f