 an element of the core.</span>
</pre><pre class="codeoutput">
ans =

    0.0142

</pre><pre class="codeinput">X.U{2} <span class="comment">%&lt;-- Extract a matrix.</span>
</pre><pre class="codeoutput">
ans =

    0.9408    0.4551
    0.7019    0.0811
    0.8477    0.8511
    0.2093    0.5620

</pre><pre class="codeinput">X{2} <span class="comment">%&lt;-- Same as above.</span>
</pre><pre class="codeoutput">
ans =

    0.9408    0.4551
    0.7019    0.0811
    0.8477    0.8511
    0.2093    0.5620

</pre><