class="s1">&#39;results/step_100000.dcd&#39;</span><span class="p">,</span> <span class="n">sampling_freq</span><span class="p">))</span>

<span class="k">def</span> <span class="nf">setVelocity</span><span class="p">(</span><span class="n">context</span><span class="p">):</span>
    <span class="n">sigma</span> <span class="o">=</span> <span class="n">u</span><span class="o">.</span><span class="n">sqrt</span><span class="p">(</span><span class="mf">1.0</span><span class="o">*</span><span class="n">u</span