Miscellaneous commands

• Changing current filesystem directory
• Conditional execution
• Command echo and messaging
• Logging commands into a file
• Getting help
• Error tolerance
• Returning from a macro
• Leaving NDAshell
• Running a UNIX command from the NDAshell
• Initializing the random number generator
• Commands for the Xview graphical user interface
  • Opening a graphic tool
  • Opening a graphical fuzzy tool
  • Viewing a graph using OpenGL
  • Pausing the execution of a command file
  • Updating a graphic window from the command line