an class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nb">abs</span><span class="p">(</span><span class="n">sx</span><span class="p">(</span><span class="mi">1</span><span class="p">))</span><span class="w"></span>
<span class="w">         </span><span class="n">ix</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">ix</span><span class="w"> </span><span class="o">+</span><span class="w"> </span><span class="n">incx</span><span class="w">