</span><span class="op">(</span><span class="fu"><a href="https://rdrr.io/r/base/length.html" class="external-link">length</a></span><span class="op">(</span><span class="va">t.sim</span><span class="op">)</span><span class="op">-</span><span class="fl">1</span>,sd<span class="op">=</span><span class="fu"><a href="https://rdrr.io/r/base/MathFun.html" class="external-link">sqrt</a></span><span class="op">(</span><span class="va">dt.sim</span><span class="op">)</span><span class="op">)</span></span>
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