question: @ Override public Enumeration < Option > listOptions ( ) { Vector < Option > result = new Vector < Option > ( ) ; result . addElement ( new Option ( "\tnumber of clusters. If omitted or -1 specified, then \n" + "\tcross validation is used to select the number of clusters." , "N" , 1 , "-N <num>" ) ) ; result . addElement ( new Option ( "\tNumber of folds to use when cross-validating to find the best number of clusters." , "X" , 1 , "-X <num>" ) ) ; result . addElement ( new Option ( "\tMaximum number of clusters to consider during cross-validation. If omitted or -1 specified, then \n" + "\tthere is no upper limit on the number of clusters." , "max" , 1 , "-max <num>" ) ) ; result . addElement ( new Option ( "\tMinimum improvement in cross-validated log likelihood required" + "\n\tto consider increasing the number of clusters." + "\n\t(default 1e-6)" , "ll-cv" , 1 , "-ll-cv <num>" ) ) ; result . addElement ( new Option ( "\tmax iterations." + "\n\t(default 100)" , "I" , 1 , "-I <num>" ) ) ; result . addElement ( new Option ( "\tMinimum improvement in log likelihood required" + "\n\tto perform another iteration of the E and M steps." + "\n\t(default 1e-6)" , "ll-iter" , 1 , "-ll-iter <num>" ) ) ; result . addElement ( new Option ( "\tverbose." , "V" , 0 , "-V" ) ) ; result . addElement ( new Option ( "\tminimum allowable standard deviation for normal density\n" + "\tcomputation\n" + "\t(default 1e-6)" , "M" , 1 , "-M <num>" ) ) ; result . addElement ( new Option ( "\tDisplay model in old format (good when there are " + "many clusters)\n" , "O" , 0 , "-O" ) ) ; result . addElement ( new Option ( "\tNumber of execution slots.\n" + "\t(default 1 - i.e. no parallelism)" , "num-slots" , 1 , "-num-slots <num>" ) ) ; result . addAll ( Collections . list ( super . listOptions ( ) ) ) ; return result . elements ( ) ; }
target:  Returns an enumeration describing the available options.