e("log")(3)                                          &lt;NA&gt;</span></a>
<a class="sourceLine" id="cb16-15" title="15"><span class="co">#&gt; 3 .Primitive("log")("a") non-numeric argument to mathematical function</span></a>
<a class="sourceLine" id="cb16-16" title="16"><span class="co">#&gt;   warning    value</span></a>
<a class="sourceLine" id="cb16-17" title="17"><span class="co">#&gt; 1      NA        0</span></a>
<a class="sourceLine" id="cb16-18" title="18"><span class="co">#&gt; 2      NA 1.098612<