#!/usr/bin/python -u
  
  # ./gen_hamm_mat.py
  # script generates diagonal matrix with hamming window values
  #     
  # author: Karel Vesely
  #
  
  from math import *
  import sys
  
  
  from optparse import OptionParser
  
  parser = OptionParser()
  parser.add_option('--fea-dim', dest='dim', help='feature dimension')
  parser.add_option('--splice', dest='splice', help='applied splice value')
  (options, args) = parser.parse_args()
  
  if(options.dim == None):
      parser.print_help()
      sys.exit(1)
  
  dim=int(options.dim)
  splice=int(options.splice)
  
  
  #generate the diagonal matrix with hammings
  M_2PI = 6.283185307179586476925286766559005
  
  dim_mat=(2*splice+1)*dim
  timeContext=2*splice+1
  print '['
  for row in range(dim_mat):
      for col in range(dim_mat):
          if col!=row:
              print '0',
          else:
              i=int(row/dim)
              print str(0.54 - 0.46*cos((M_2PI * i) / (timeContext-1))),
      print
  
  print ']'