<a href="../reference/get_flowline_index.html">get_flowline_index()</a></code> did. The below shows the percent of
COMIDs and REACHCODEs that match and shows a histogram of the measure
differences for the REACHCODEs that were matched.</p>
<div class="sourceCode" id="cb3"><pre class="downlit sourceCode r">
<code class="sourceCode R"><span><span class="va">p_match</span> <span class="op">&lt;-</span> <span class="fl">100</span> <span class="op">*</span> <span class="fu"><a href="https://rdrr.io/r/base/length.