lass="fl">1</span><span class="op">:</span><span class="fl">20</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="va">frm</span><span class="op">$</span><span class="va">y</span> <span class="op">&lt;-</span> <span class="fl">5</span> <span class="op">+</span> <span class="va">frm</span><span class="op">$</span><span class="va">x</span> <span class="op">+</span> <span class="fl">0.2</span> <span class="op">*</span> <span class="va">frm</span><span class="op">$</span><span cl