ht matrix</span>
		<span class="n">alpha</span> <span class="o">=</span> <span class="p">[</span> <span class="p">(</span> <span class="n">f</span><span class="o">.</span><span class="n">vSub</span> <span class="o">-</span> <span class="mf">1.0</span> <span class="p">)</span> <span class="o">/</span> <span class="n">f</span><span class="o">.</span><span class="n">vScale</span> <span class="k">for</span> <span class="n">f</span> <span class="ow">in</span> <span class="n">features</span> <span class="p">]</sp