 class="op">-</span> <span class="va">d2</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> |2, s = "a", v = (1L 2L 3L)|</span>
<span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span><span class="va">d2</span>, <span class="va">d</span><span class="op">)</span> <span class="co"># same as d2 + d</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> |0, 1, 1, 2, s = "a", v = (1L