#! /usr/bin/env python
#
def r8vec_normal_ab ( n, mu, sigma, seed ):

#*****************************************************************************80
#
## R8VEC_NORMAL_AB returns a scaled pseudonormal R8VEC.
#
#  Licensing:
#
#    This code is distributed under the GNU LGPL license. 
#
#  Modified:
#
#    04 March 2015
#
#  Author:
#
#    John Burkardt
#
#  Parameters:
#
#    Input, integer N, the number of entries in the vector.
#
#    Input, real MU, the average value of the PDF.
#
#    Input, real SIGMA, the standard deviation of the PDF.
#
#    Input, integer SEED, a seed for the random number generator.
#
#    Output, real X(N), the vector of pseudorandom values.
#
#    Output, integer SEED, an updated seed for the random number generator.
#
  import numpy as np
  from r8_normal_01 import r8_normal_01

  x = np.zeros ( n )

  for i in range ( 0, n ):
    xi, seed = r8_normal_01 ( seed )
    x[i] = mu + sigma * xi

  return x, seed

def r8vec_normal_ab_test ( ):

#*****************************************************************************80
#
## R8VEC_NORMAL_AB_TEST tests R8VEC_NORMAL_AB.
#
#  Licensing:
#
#    This code is distributed under the GNU LGPL license. 
#
#  Modified:
#
#    04 March 2015
#
#  Author:
#
#    John Burkardt
#
  import numpy as np
  import platform
  from r8vec_print import r8vec_print

  print ( '' )
  print ( 'R8VEC_NORMAL_AB_TEST' )
  print ( '  Python version: %s' % ( platform.python_version ( ) ) )
  print ( '  R8VEC_NORMAL_AB returns a vector of Normal AB values' )

  n = 10
  mu = 15.0
  sigma = 0.25
  seed = 123456789

  print ( '' )
  print ( '  Mean = %g' % ( mu ) )
  print ( '  Standard deviation = %g' % ( sigma ) )
  print ( '  SEED = %d' % ( seed ) )

  r, seed = r8vec_normal_ab ( n, mu, sigma, seed )

  r8vec_print ( n, r, '  Vector:' )
#
#  Terminate.
#
  print ( '' )
  print ( 'R8VEC_NORMAL_AB_TEST:' )
  print ( '  Normal end of execution.' )
  return

if ( __name__ == '__main__' ):
  from timestamp import timestamp
  timestamp ( )
  r8vec_normal_ab_test ( )
  timestamp ( )