/tt></a> help function (type
    <tt>help meanFunctions</tt> to get help), and an example is the
    <a href="../mean/meanLinear.m"><tt>meanLinear</tt></a> function.
    <dt><strong>Covariance functions</strong>
  <dd>There are many covariance functions available, all start with
    the three letters <tt>cov</tt> and reside in
    the <a href="../cov">cov directory</a>. An overview is provided by
    the <a href="../covFunctions.m"><tt>covFunctions</tt></a> help function
    (type <tt>help covFunctions</tt>