span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">bestvals</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">errup</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">errdown</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">units</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">fixed</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">runtime</s