@Override public String toString(){
  if (m_Covariance == null) {
    calculateCovariance();
  }
  String result="NN Conditional Estimator. " + m_CondValues.size() + " data points.  Mean = "+ Utils.doubleToString(m_ValueMean,4,2)+ "  Conditional mean = "+ Utils.doubleToString(m_CondMean,4,2);
  result+="  Covariance Matrix: \n" + m_Covariance;
  return result;
}

@ Override public String toString ( ) { if ( m_Covariance == null ) { calculateCovariance ( ) ; } String result = "NN Conditional Estimator. " + m_CondValues . size ( ) + " data points.  Mean = " + Utils . doubleToString ( m_ValueMean , 4 , 2 ) + "  Conditional mean = " + Utils . doubleToString ( m_CondMean , 4 , 2 ) ; result += "  Covariance Matrix: \n" + m_Covariance ; return result ; }
display a representation of this estimator
