Neuralynx provides two interfaces between Neuralynx data and MATLAB: The first is the Matlab Import/Export MEX files. They will allow you to perform offline analysis of data in Matlab on files recorded from Cheetah. At this time, there is no support for raw data files.
The second option, NetCom for Matlab, allows for online analysis of data and control of Cheetah. You can download the NetCom Development Package. An example of NetCom for MATLAB usage is included in this package.