Deadband Help

[MoMo]

Hello we have a working mecanum code but we need to add dead band for a little better control. can any one help?

#include "WPILib.h"

// Team 1721 mecanum code 2013 By: Zakary Tobine at 2/11/13 10:33am

// Needs to add 2 relays; one for motor for shooter; one for frishbee pusher 



class RobotDemo : public SimpleRobot
{
	RobotDrive myRobot; // robot drive system
	Joystick stick; // only joystick

public:
	RobotDemo(void):
		myRobot(1, 2, 3, 4),	// these must be initialized in the same order
		stick(1)		// as they are declared above.
	{
		
		
		stick.SetAxisChannel(Joystick::kTwistAxis, 3);// Add the 3rd axis 
		myRobot.SetExpiration(0.1);// The time the motors stop moving after a value is sent  
	}

	
	void Autonomous(void)
	{
		// Commented out till a later date 
		
		//myRobot.SetSafetyEnabled(false);
		//myRobot.Drive(-0.5, 0.0); 	// drive forwards half speed
		//Wait(2.0); 				//    for 2 seconds
		//myRobot.Drive(0.0, 0.0); 	// stop robot
	}

	/**
	 * Runs the motors with one joystick mecanum. 
	 */
	void OperatorControl(void)
	{
		myRobot.SetSafetyEnabled(true);
		while (IsOperatorControl())
		{
		myRobot.MecanumDrive_Cartesian(stick.GetX(), stick.GetY(), stick.GetTwist());// Mecanum drive single joystick drive 
			
		
		
		
		Wait(0.005);				// wait for a motor update time
		}
	}
	
	/**
	 * Runs during test mode
	 */
	void Test() {

	}
};

START_ROBOT_CLASS(RobotDemo);