 class="op">(</span><span class="fl">1</span>,<span class="fl">1</span><span class="op">)</span><span class="op">+</span><span class="fl">3</span><span class="op">)</span>,<span class="fl">50</span>,alpha<span class="op">=</span><span class="fl">0.005</span><span class="op">)</span></span></code></pre></div>
<p>Merge the four selections into a single one.</p>
<div class="sourceCode" id="cb8"><pre class="downlit sourceCode r">
<code class="sourceCode R"><span><span class="va">selection</span><span class="op"