Real time data through Arduino and Matlab

I am trying to get real-time data from a Pixy camera through an Arduino using this Matlab code:

I've never used Arduino before and have no idea what to do about the terminator that they are talking about. In Matlab it says that the terminator for the comport is LF, but that isn't even an option for the serial monitor for the Arduino. Any help is appreciated.

Serial.println("test"); will add a LF after the word "test"

Serial.print("test"); won't