pan class="op">&gt;</span><span class="st"> </span><span class="dv">210</span>)</a>
<a class="sourceLine" id="cb1-2" title="2">gm1 &lt;-<span class="st"> </span><span class="kw">geeglm</span>(serCholD <span class="op">~</span><span class="st"> </span><span class="kw">ns</span>(year, <span class="dt">knots =</span> <span class="kw"><a href="https://www.rdocumentation.org/packages/base/topics/c">c</a></span>(<span class="dv">3</span>, <span class="dv">6</span>), <span class="dt">Boundary.knots =</span> <span 