="op">)</span><span class="op">)</span> <span class="op">+</span> <span class="fu">xlab</span><span class="op">(</span><span class="st">"Time series lengths"</span><span class="op">)</span> <span class="op">+</span>
  <span class="fu">ylab</span><span class="op">(</span><span class="st">"Estimated Autocorrelation"</span><span class="op">)</span> <span class="op">+</span> <span class="fu">scale_colour_manual</span><span class="op">(</span>values<span class="op">=</span><span class="va">noise</span><span clas