freemat: cannot connect to X server

FreeMat v4.2 Command Line Help You can invoke FreeMat with the following command line options: -f <command> Runs FreeMat in command mode. FreeMat will startup, run the given command, and then quit. Note that this option uses the remainder of the command line, so use it last. -nogui Suppress the GUI for FreeMat. -noX Disables the graphics subsystem. -nogreet Skips the greeting when starting. -t Test mode -- by default FreeMat will exit with code 1 in this mode. -e uses a dumb terminal interface (no command line editing, etc.) This flag is primarily used when you want to capture input/output to FreeMat from another application. -s <file> Script mode. If you put a #!FreeMat -s at the beginning of a .m file, and make it executable in Unix-like OSes, FreeMat will start up, execute the script, and quit automatically. -i <path> Install FreeMat - provide the path to the FreeMat data directory (containing the scripts, help and other files.). Normally these are installed in /usr/local/share/ but regardless, you must run FreeMat -i once to indicate the location of this directory. Note that in this mode, FreeMat will only update its internal configuration and then exit. -p <path> Set the FreeMat path to the given pathspec. -r <path> Set the FreeMat root path to the given pathspec. -help Get this help text