hypershpere, show ) </strong></div>

<h2><a name="_description"></a>DESCRIPTION <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="fragment"><pre class="comment"> Generate random vectors in PCA subspace.

 Used to generate random vectors from the subspace spanned by the first k
 principal components.  The points generated come from the gaussian
 distribution from within the subspace. Can optionally generate points on
 the subspace that are also on a hypershpere centered on