if (weightByDistance)
if (m_weightByDistance)
  public String toString()  {    StringBuffer text = new StringBuffer();    if (m_trainInstances == null)      {	text.append("ReliefF feature evaluator has not been built yet\n");      }    else      {	text.append("\tReliefF Ranking Filter");	text.append("\n\tInstances sampled: ");	if (m_sampleM == -1)	  {	    text.append("all\n");	  }	else	  {	    text.append(m_sampleM+"\n");	  }	text.append("\tNumber of nearest neighbours (k): "+m_Knn+"\n");	if (weightByDistance)	  {	    text.append("\tExponentially decreasing (with distance) "			+"influence for\n"			+"\tnearest neighbours. Sigma: "+m_sigma+"\n");	  }	else	  {	    text.append("\tEqual influence nearest neighbours\n");	  }      }    return text.toString();  }