class="hl kwd">c</span><span class="hl std">(</span><span class="hl num">0</span><span class="hl std">,</span> <span class="hl num">1</span><span class="hl std">,</span> <span class="hl num">0</span><span class="hl std">),</span> <span class="hl str">&quot;cm&quot;</span><span class="hl std">))</span>
<span class="hl kwd">grid.offsetXspline</span><span class="hl std">(x, y, w,</span> <span class="hl kwc">shape</span><span class="hl std">=</span><span class="hl opt">-</span><span class="hl num">1</span><span