@Override public final String toString(Attribute att){
  return toString(att.index());
}

@ Override public final String toString ( Attribute att ) { return toString ( att . index ( ) ) ; }
returns the description of one value of the instance as a string . if the instance doesn ' t have access to a dataset it returns the internal floating - point value . quotes string values that contain whitespace characters , or if they are a question mark . the given attribute has to belong to a dataset .
