FILE IN

        LAS\FILE IN Name

    Open an input file for reading.

    The input file can be of 2 different forms:
      - the usual Class Data Format (.30m or other produced by several tele-
        scopes, and by Class itself),
      - a  VLM  (Velocity-Position-Position) cube in the Gildas Data Format.
        LMV cubes must be transposed first to VLM before use.
    The usual Class commands (FIND, GET, etc)  work  transparently  on  both
    kind of files.