li><p><code class="docutils literal notranslate"><span class="pre">Fx</span></code>    - Fuzzy function name, one of the following strings:
{<code class="docutils literal notranslate"><span class="pre">'sigmoid'</span></code>, <code class="docutils literal notranslate"><span class="pre">'modsampen'</span></code>, <code class="docutils literal notranslate"><span class="pre">'default'</span></code>, <code class="docutils literal notranslate"><span class="pre">'gudermannian'</span></code>, <code class="docutil