ink">list</a></span><span class="op">(</span>c_mean_est <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/rep.html" class="external-link">rep</a></span><span class="op">(</span><span class="fl">2</span>, <span class="va">simmr_in</span><span class="op">$</span><span class="va">n_tracers</span><span class="op">)</span>, c_sd_est <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/rep.html" class="external-link">rep</a></span><span class="op">(</span><span class