.F 2000   F       4 452.1       5.2      4.5      4 390.37</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 5 2000.10002.F 2000   F       2 342.9       3.2      1.3      1 135.47</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> 6 2000.10002.F 2000   F       2 342.9       3.2      2.4      2 255.56</span>
<span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/stats/xtabs.html" class="external-link">xtabs</a></span><span class="op">(</span><span class="op">~</span><span