span class="n">X</span><span class="p">(</span><span class="n">i</span><span class="p">)</span><span class="o">&lt;</span><span class="n">xmin</span><span class="w"> </span><span class="p">)</span><span class="w"> </span><span class="n">xmin</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">X</span><span class="p">(</span><span class="n">i</span><span class="p">)</span>
<span class="w">            </span><span class="k">IF</span><span class="w"> </span><span class