 Access an element of the core.</span>
</pre><pre class="codeoutput">ans =
    0.6808
</pre><pre class="codeinput">X.U{2} <span class="comment">%&lt;-- Extract a matrix.</span>
</pre><pre class="codeoutput">ans =
    0.7266    0.4399
    0.4120    0.9334
    0.7446    0.6833
    0.2679    0.2126
</pre><pre class="codeinput">X{2} <span class="comment">%&lt;-- Same as above.</span>
</pre><pre class="codeoutput">ans =
    0.7266    0.4399
    0.4120    0.9334
    0.7446    0.6833
    0.2679    0.2126
</pre><h2