r-out co"><span class="r-pr">#&gt;</span> [2,]  1.5    1    0</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> [3,] -5.0   -4    1</span>
<span class="r-in"><span><span class="cn">T</span> <span class="op"><a href="https://rdrr.io/r/base/matmult.html" class="external-link">%*%</a></span> <span class="va">Ab</span>    <span class="co"># same as Abt</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span>                 b</span>
<span class="r-out co"><span class="r-pr">#&gt;<