ean vector. By default, all means
are set to zero.</p></dd>

  <dt>variance.fixed</dt>
<dd><p>Matrix (with rows and three columns) with fixed entries in the covariance matrix
(see Examples). The entry \(c_{kd}\) of the covariance between dimensions
  \(k\) and \(d\) is set to \(c_0\) iff <code>variance.fixed</code> has a row with
  a \(k\) in the first column, a \(d\) in the second column and the value
  \(c_0\) in the third column.</p></dd>

  <dt>est.corr</dt>
<dd><p>Should only a correlation matrix inste