class="num">3</span>,<span class="num">4</span>))
m.at(<span class="num">0</span>,<span class="num">0</span>) == Value(<span class="num">1</span>)</pre><p>The method <code>raw</code> accesses the underlying value directly.</p><pre><span class="kw">val</span> m = Mat(<span class="num">2</span>,<span class="num">2</span>,<span class="std">Array</span>(<span class="num">1</span>,<span class="num">2</span>,<span class="num">3</span>,<span class="num">4</span>))
m.raw(<span class="num">0</span>,<span class="num"