text: #! /usr/bin/env python
  
  import nmrglue as ng
  import numpy as np
  import glob
  import os.path
  
  # create a list of directories to coadd
  dlist = glob.glob("run*.dir")
  dlist.sort()
  
  # create a list of 2D files in the first directory
  flist = glob.glob(os.path.join(dlist[0], "*.fid", "test.fid"))
  flist.sort()
  
  # loop over the files
  for base_fname in flist:
      
      # initilize the new data
      dic, data = ng.pipe.read(base_fname)
      coadd_data = np.zeros_like(data)
      coadd_dic = dict(dic)
      
      # loop over the pseudo-3D directories
      for d in dlist:
          
          # the file names is found by replace the directory name
          f = base_fname.replace(dlist[0], d, 1)    
          print "Coadding file:", f
          dic, data = ng.pipe.read(f)
          coadd_data += data / len(dlist)
  
      # write out the file
      of = base_fname.replace(dlist[0], "coadded_data.dir", 1)
      print "Writing out:", of
      ng.pipe.write(of, coadd_dic, coadd_data, overwrite=True)
  