pan><span class="sig-paren">(</span><em class="sig-param"><span class="n"><span class="pre">adata</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">first_moment</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">True</span></span></em>, <em class="sig-param"><span class="n"><span class="pre">method</span></span><span class="o"><span class="pre">=</span></span><span class="default_value"><span class="pre">'Ridge'</span></span>