MATLAB Interface for Arduino

i want to Interface Arduino uno with matlab using simulink or m file

and further wanted to run two motors

and motor will rotate at different spend depend on the value which i m going to give at matlab

[Walter Roberson]

Which MATLAB version are you using?

[mohammad]

matlab 2012b

[vishal Verma]

i want to Interface Arduino uno with matlab using simulink or m file

 to run two stepper motors. Can anybody give a lead how to start with? Thanks!