question: @ Override public Enumeration < Option > listOptions ( ) { Vector < Option > result = enumToVector ( super . listOptions ( ) ) ; result . addElement ( new Option ( "\tThe number of attributes (default " + defaultNumAttributes ( ) + ")." , "a" , 1 , "-a <num>" ) ) ; result . addElement ( new Option ( "\tClass Flag, if set, the cluster is listed in extra attribute." , "c" , 0 , "-c" ) ) ; result . addElement ( new Option ( "\tThe indices for boolean attributes." , "b" , 1 , "-b <range>" ) ) ; result . addElement ( new Option ( "\tThe indices for nominal attributes." , "m" , 1 , "-m <range>" ) ) ; return result . elements ( ) ; }
target:  Returns an enumeration describing the available options.