pan><span class="op">:</span><span class="fl">6</span>, nrow <span class="op">=</span> <span class="fl">2</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="va">polar_x</span> <span class="op">&lt;-</span> <span class="fu">polar</span><span class="op">(</span><span class="va">X</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="va">P</span> <span class="op">&lt;-</span> <span class="va">polar_x</span><span class="op">$</span><span class="va">