question: @ 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 ; }
target:  Display a representation of this estimator 