"sourceCode"><pre><code>  family   genus   species     b_0    b_3   b_4
1 Fagaceae Quercus kelloggii  2.66 -0.647 0.728</code></pre></div><p></p><hr><code>rc = 1 - ((1)/(1 + exp(b_0 + b_1 * hst + b_2 * ccfl)))</code><ul><li><p><code>rc [ft ft-1]</code> - crown ratio</p></li>
<li><p><code>hst [ft]</code> - total height of the stem</p></li>
<li><p><code>ccfl [ft2 ft-2]</code> - crown competition factor of large trees</p></li>
</ul><p><b>Model Parameters</b></p><div class="sourceCode"><pre><code>  family   gen