#! /usr/bin/env python
#
def ubvec_unrank_gray ( rank, n ):

#*****************************************************************************80
#
## UBVEC_UNRANK_GRAY unranks a UBVEC.
#
#  Licensing:
#
#    This code is distributed under the GNU LGPL license.
#
#  Modified:
#
#    23 November 2015
#
#  Author:
#
#    John Burkardt
#
#  Parameters:
#
#    Input, integer RANK, the rank of the UBVEC.
#    0 <= RANK < 2^N.
#
#    Input, integer N, the size of the UBVEC.
#
#    Output, integer UBVEC(N), the UBVEC of given rank.
#
  from ui4_to_ubvec import ui4_to_ubvec
  from ui4_unrank_gray import ui4_unrank_gray

  ui4 = ui4_unrank_gray ( rank )
  ubvec = ui4_to_ubvec ( ui4, n )

  return ubvec

def ubvec_unrank_gray_test ( ):

#*****************************************************************************80
#
## UBVEC_UNRANK_GRAY_TEST tests UBVEC_UNRANK_GRAY.
#
#  Licensing:
#
#    This code is distributed under the GNU LGPL license. 
#
#  Modified:
#
#    23 November 2015
#
#  Author:
#
#    John Burkardt
#
  import platform

  n = 5

  print ( '' )
  print ( 'UBVEC_UNRANK_GRAY_TEST' )
  print ( '  Python version: %s' % ( platform.python_version ( ) ) )
  print ( '  UBVEC_UNRANK_GRAY unranks a UBVEC.' )
  print ( '' )
  print ( '  Rank  UBVEC' )
  print ( '' )
 
  for rank in range ( 0, 32 ):
    ubvec = ubvec_unrank_gray ( rank, n )
    print ( '  %4d  ' % ( rank ), end = '' )
    for j in range ( 0, n ):
      print ( '%2d' % ( ubvec[j] ), end = '' )
    print ( '' )
#
#  Terminate.
#
  print ( '' )
  print ( 'UBVEC_UNRANK_GRAY_TEST' )
  print ( '  Normal end of execution.' )
  return

if ( __name__ == '__main__' ):
  from timestamp import timestamp
  timestamp ( )
  ubvec_unrank_gray_test ( )
  timestamp ( )