n><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span>      [,1] [,2] [,3] [,4]</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> [1,]    1    0    0    2</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> [2,]    0    1    0    3</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> [3,]    0    0    1   -1</span>
<span class="r-in"><span><span class="cn">T</span> <span class="op">&lt;-</span> <span class="fu">buildTmat</span><span cl