>0.05</span>, <span class="fl">0.95</span><span class="op">)</span>, na.rm<span class="op">=</span><span class="cn">T</span><span class="op">)</span><span class="op">[[</span><span class="fl">1</span><span class="op">]</span><span class="op">]</span>
<span class="op">}</span><span class="op">)</span><span class="op">(</span><span class="va">acf.surv</span><span class="op">)</span><span class="op">)</span>, upper.ci <span class="op">=</span> <span class="op">(</span><span class="op">(</span><span class="kw">