public MarginPerceptron() {
		linearParam = new FeatureVector();
		online_learning_rate = 1.0;
		if (CommandLineUtilities.hasArg("online_learning_rate")) {
			online_learning_rate = CommandLineUtilities.getOptionValueAsFloat("online_learning_rate");
		}
		iters = 5;
		if (CommandLineUtilities.hasArg("online_training_iterations")) {
		    iters = CommandLineUtilities.getOptionValueAsInt("online_training_iterations");
		}
	}