/** * Parses a given list of options. * * <p> * <!-- options-start --> * Valid options are: * * <p> * * <pre> -A <attribute evaluator> * class name of attribute evaluator to use for ranking. Place any * evaluator options LAST on the command line following a "--". * eg.: * -A weka.attributeSelection.GainRatioAttributeEval ... -- -M * (default: weka.attributeSelection.GainRatioAttributeEval)</pre> * * <pre> -S <step size> * number of attributes to be added from the * ranking in each iteration (default = 1).</pre> * * <pre> -R <start point> * point in the ranking to start evaluating from. * (default = 0, ie. the head of the ranking).</pre> * * <pre> * Options specific to evaluator weka.attributeSelection.GainRatioAttributeEval: * </pre> * * <pre> -M * treat missing values as a seperate value.</pre> * * <!-- options-end --> * * @param options the list of options as an array of strings * @throws Exception if an option is not supported */ public void setOptions(String[] options) throws Exception { String optionString; resetOptions(); optionString = Utils.getOption('S', options); if (optionString.length() != 0) { setStepSize(Integer.parseInt(optionString)); } optionString = Utils.getOption('R', options); if (optionString.length() != 0) { setStartPoint(Integer.parseInt(optionString)); } optionString = Utils.getOption('A', options); if (optionString.length() == 0) optionString = GainRatioAttributeEval.class.getName(); setAttributeEvaluator(ASEvaluation.forName(optionString, Utils.partitionOptions(options))); }