<p>I also voted to migrate that question.  My criterion is simple:  What does the OP need explained?  If it's a statistical concept, then the thread belongs here; if it's something about how to use software, then it belongs elsewhere.  The OP asked how to fix the covariance of a Gaussian kernel to some pre-specified value in Python.  A perfectly satisfactory answer could have been:  </p>

<blockquote>
  <p>Yes, that's easy to do.  You set <code>argument=value</code>.  </p>
</blockquote>
