"fl">10</span><span class="op">]</span><span class="op">*</span><span class="va">phi</span><span class="op">)</span>, pch<span class="op">=</span><span class="fl">20</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="fu"><a href="https://rdrr.io/r/graphics/grid.html" class="external-link">grid</a></span><span class="op">(</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="va">power</span> <span class="op">&lt;-</span> <span class="op">-</span