In this chapter, we describe advanced use of PLplot.
      PLplot supports a large number of command line arguments, but it is
      up to the user to pass these to PLplot for processing at the
      beginning of execution.  The function
      plParseInternalOpts is responsible for parsing
      the argument list, removing all that are recognized by PLplot, and
      taking the appropriate action before returning.  There are an
      extensive number of options available to affect this process.  The
      command line arguments recognized by PLplot are given by the -h
      option:
    
| % x01c -h
Usage:
        ./x01c [options]
PLplot options:
    -h                   Print out this message
    -v                   Print out the PLplot library version number
    -verbose             Be more verbose than usual
    -debug               Print debugging info (implies -verbose)
    -dev name            Output device name
    -o name              Output filename
    -display name        X server to contact
    -px number           Plots per page in x
    -py number           Plots per page in y
    -geometry geom       Window size, in pixels (e.g. -geometry 400x300)
    -wplt xl,yl,xr,yr    Relative coordinates [0-1] of window into plot
    -mar margin          Margin space in relative coordinates (0 to 0.5, def 0)
    -a aspect            Page aspect ratio (def: same as output device)
    -jx justx            Page justification in x (-0.5 to 0.5, def 0)
    -jy justy            Page justification in y (-0.5 to 0.5, def 0)
    -ori orient          Plot orientation (0,2=landscape, 1,3=portrait)
    -freeaspect          Do not preserve aspect ratio on orientation swaps
    -width width         Sets pen width (1 <= width <= 10)
    -bg color            Background color (0=black, FFFFFF=white)
    -ncol0 n             Number of colors to allocate in cmap 0 (upper bound)
    -ncol1 n             Number of colors to allocate in cmap 1 (upper bound)
    -fam                 Create a family of output files
    -fsiz size           Output family file size in MB (e.g. -fsiz 1.0)
    -fbeg number         First family member number on output
    -finc number         Increment between family members
    -fflen length        Family member number minimum field width
    -nopixmap            Don't use pixmaps in X-based drivers
    -db                  Double buffer X window output
    -np                  No pause between pages
    -server_name name    Main window name of PLplot server (tk driver)
    -server_host name    Host to run PLplot server on (dp driver)
    -server_port name    Port to talk to PLplot server on (dp driver)
    -user name           User name on remote node (dp driver)
All parameters must be white-space delimited.  Some options are driver
dependent.  Please see the PLplot reference document for more detail.
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