question: public Enumeration listOptions ( ) { Vector newVector = new Vector ( ) ; newVector . addElement ( new Option ( "\tSpecify list of columns to use as MEKA class attributes. 'first' and 'last' are valid\n" + "\tindexes. (default: last)" , "R" , 1 , "-R <index1,index2-index4,...>" ) ) ; return newVector . elements ( ) ; }
target:  Returns an enumeration describing the available options.