question: @ Override public Enumeration < Option > listOptions ( ) { Vector < Option > newVector = new Vector < Option > ( 3 ) ; newVector . addElement ( new Option ( "\tSpecify a starting set of attributes.\n" + "\tEg. 1,3,5-7.\n" + "\tAny starting attributes specified are\n" + "\tignored during the ranking." , "P" , 1 , "-P <start set>" ) ) ; newVector . addElement ( new Option ( "\tSpecify a theshold by which attributes\n" + "\tmay be discarded from the ranking." , "T" , 1 , "-T <threshold>" ) ) ; newVector . addElement ( new Option ( "\tSpecify number of attributes to select" , "N" , 1 , "-N <num to select>" ) ) ; return newVector . elements ( ) ; }
target:  Returns an enumeration describing the available options.