n class="op">(</span><span class="fl">0</span>,<span class="fl">0</span><span class="op">)</span>,</span>
<span>                     Sigma<span class="op">=</span><span class="va">Sigma</span><span class="op">)</span></span>
<span><span class="va">obs</span><span class="op">[</span>,<span class="fl">1</span><span class="op">]</span> <span class="op">&lt;-</span> <span class="va">obs</span><span class="op">[</span>,<span class="fl">1</span><span class="op">]</span> <span class="op">+</span> <span class="fu">