How to interact Matlab with Arduino and Motor Shield Rev 3?

Hello,

I've been trying sync up Matlab and Arduino (along with a rev 3 motor shield) in order to controlk a DC motor.

After creating an arduino object, along with the add on object.

As specified below, the problem comes when creating a dcmotor object.

Is there a way to get past this? and

Are there libraries available specifically for this shield?

Thanks for reading.

a=arduino('COM6','Uno','Libraries'{'Adafruit/MotorShieldV2','I2C','RotaryEncoder'});
mot=addon(a,'Adafruit/MotorShieldV2');

% Here is where I have trouble
dcm= dcmotor(mot,'port');  % I cannot specify a port
% What I mean is that the Rev3 motor shield does not specifiy "M1" or "M2" insead it uses "Channel A and B" so this is a problem