code></pre></div><p></p><hr><code>rc = 1 - ((1)/(1 + exp(b_0 + b_1 * hst + b_2 * ccfl + b_3 * log(gn))))</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>
<li><p><code>gn [ft2 acre-1]</code> - stand-level basal area</p></li>
</ul><p><b>Model Parameters</b></p><div class="sourceCode"><pre><code>  family    genus   species       b_0      b_1   