L-BFGS-B&quot;</span>, </a>
<a class="sourceLine" id="cb26-6" title="6">                           <span class="dt">covariates =</span> salinity,</a>
<a class="sourceLine" id="cb26-7" title="7">                           <span class="dt">alpha_form =</span> <span class="st">&quot;pairwise&quot;</span>,</a>
<a class="sourceLine" id="cb26-8" title="8">                           <span class="dt">lambda_cov_form =</span> <span class="st">&quot;global&quot;</span>, <span class="co"># effect of covariates over la