my ahrs sensor is sending data to matlab
How did you connect the sensor to matlab? Wasn't it a bit hard to solder the wires to the bits?
the results of the processing needs to be sent to the arduino to run motors
What results? Speed and direction?
here is the matlab code
how do i interface my arduino deumilanove so that it can receive this data from the serial port send by matlab
Start by losing the stupid buzzwords. Interface? What does that mean?
Having the Arduino read data from the serial port is trivial. Look at the Serial.available() and Serial.read() functions.
is there any simple way of receiving this serial data on my arduino
What's wrong with your shift key?