fl">0</span><span class="op">)</span> <span class="op">+</span> <span class="fl">1</span> <span class="op">/</span> <span class="fu"><a href="https://rdrr.io/r/base/sum.html" class="external-link">sum</a></span><span class="op">(</span><span class="va">y</span> <span class="op">==</span> <span class="fl">1</span><span class="op">)</span><span class="op">)</span><span class="op">)</span></span></span>
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<span class="r-in"><span><span class="fu">snp_ldsc2</span><span clas