code: def main():
      
      args = sys.argv
      if "-h" in args:
          print(main.__doc__)
          sys.exit()
      dir_path = pmag.get_named_arg('-WD', '.')
      fmt = pmag.get_named_arg('-fmt', 'svg')
      save_plots = False
      interactive = True
      if '-sav' in sys.argv:
          save_plots = True
          interactive = False
      infile = pmag.get_named_arg("-f", "specimens.txt")
      ipmag.dayplot_magic(dir_path, infile, save=save_plots,
                          fmt=fmt, interactive=interactive)
docs: NAME
          dayplot_magic.py
  
      DESCRIPTION
          makes 'day plots' (Day et al. 1977) and squareness/coercivity,
          plots 'linear mixing' curve from Dunlop and Carter-Stiglitz (2006).
            squareness coercivity of remanence (Neel, 1955) plots after
            Tauxe et al. (2002)
  
      SYNTAX
          dayplot_magic.py [command line options]
  
      OPTIONS
          -h prints help message and quits
          -f: specify input hysteresis file, default is specimens.txt
          -fmt [svg,png,jpg] format for output plots, default svg
          -sav saves plots and quits quietly