Running COMSOL Multiphysics with MATLAB starts a COMSOL Multiphysics server and a MATLAB Desktop. No COMSOL graphical user interface is involved. For a tutorial, see the LiveLink for MATLAB User’s Guide.

To display the plot in a COMSOL graphics window you need to run COMSOL with MATLAB using the graphics server. To do so, start COMSOL with MATLAB from a terminal window with the -graphics flag:

The xterm program is necessary for the command comsol mphserver matlab. The csh program is needed to call MATLAB functions from COMSOL Multiphysics.