reducing sensativity of joystick for precision?

[windell747]

Hi, we are using a joystick to act as a throttle. We realize that we don't need to move the joystick far to get the bot moving fast. I'm trying to reduce the sensativty of the joystick near the beginning of the swing for precise control. We could just scale the output down, but I would like to limit the max speed at the top of the swing. Does anyone have any suggestions? I heard of using a cubic equation, but I'm not sure how to impiment this in code. I was also think about using a sine or cos function to multiply to the throttle raw output, but then that would start getting floating point math involved in which i want to try to stay away from.

Thanks,
windell