/Random'>set.seed</a></span>(<span class='fl'>999</span>)
<span class='no'>n</span> <span class='kw'>=</span> <span class='fl'>10</span>^<span class='fl'>4</span>
<span class='no'>Xt</span> <span class='kw'>=</span> <span class='fu'><a href='https://www.rdocumentation.org/packages/stats/topics/arima.sim'>arima.sim</a></span>(<span class='kw'>n</span> <span class='kw'>=</span> <span class='no'>n</span>, <span class='fu'><a href='https://www.rdocumentation.org/packages/base/topics/list'>list</a></span>(<span 