#! /usr/bin/env python3
#
def p00_data_num ( prob ):

#*****************************************************************************80
#
## p00_data_num() returns the number of data points for any problem.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    29 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Input:
#
#    integer PROB, the problem index.
#
#  Output:
#
#    integer DATA_num, the number of data points.
#
  if ( prob == 1 ):
    data_num = p01_data_num ( )
  elif ( prob == 2 ):
    data_num = p02_data_num ( )
  elif ( prob == 3 ):
    data_num = p03_data_num ( )
  elif ( prob == 4 ):
    data_num = p04_data_num ( )
  elif ( prob == 5 ):
    data_num = p05_data_num ( )
  elif ( prob == 6 ):
    data_num = p06_data_num ( )
  elif ( prob == 7 ):
    data_num = p07_data_num ( )
  elif ( prob == 8 ):
    data_num = p08_data_num ( )
  else:
    print ( '' )
    print ( 'p00_data_num - Fatal error!' )
    print ( '  Unexpected input value of PROB.' )
    raise Exception ( 'p00_data_num - Fatal error!' )

  return data_num

def p01_data_num ( ):

#*****************************************************************************80
#
## p01_data_num returns the number of data points for problem p01.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    29 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Output:
#
#    integer DATA_num, the number of data points.
#
  data_num = 18

  return data_num

def p02_data_num ( ):

#*****************************************************************************80
#
## p02_data_num returns the number of data points for problem p02.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    29 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Output:
#
#    integer DATA_num, the number of data points.
#
  data_num = 18

  return data_num

def p03_data_num ( ):

#*****************************************************************************80
#
## p03_data_num returns the number of data points for problem p03.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    29 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Output:
#
#    integer DATA_num, the number of data points.
#
  data_num = 11

  return data_num

def p04_data_num ( ):

#*****************************************************************************80
#
## p04_data_num returns the number of data points for problem p04.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    29 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Output:
#
#    integer DATA_num, the number of data points.
#
  data_num = 8

  return data_num

def p05_data_num ( ):

#*****************************************************************************80
#
## p05_data_num returns the number of data points for problem p05.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    29 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Output:
#
#    integer DATA_num, the number of data points.
#
  data_num = 9

  return data_num

def p06_data_num ( ):

#*****************************************************************************80
#
## p06_data_num returns the number of data points for problem p06.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    29 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Output:
#
#    integer DATA_num, the number of data points.
#
  data_num = 49

  return data_num

def p07_data_num ( ):

#*****************************************************************************80
#
## p07_data_num returns the number of data points for problem p07.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    29 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Output:
#
#    integer DATA_num, the number of data points.
#
  data_num = 4

  return data_num

def p08_data_num ( ):

#*****************************************************************************80
#
## p08_data_num returns the number of data points for problem p08.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    29 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Output:
#
#    integer DATA_num, the number of data points.
#
  data_num = 12

  return data_num

def p00_data_num_test ( ):

#*****************************************************************************80
#
## p00_data_num_test() tests p00_data_num.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    29 June 2015
#
#  Author:
#
#    John Burkardt
#
  import platform

  print ( '' )
  print ( 'p00_data_num_test' )
  print ( '  Python version: %s' % ( platform.python_version ( ) ) )
  print ( '  p00_data_num returns the number of data points for any problem.' )
  print ( '' )
  print ( '  Problem   Data Num' )
  print ( '' )

  prob_num = p00_prob_num ( )

  for prob in range ( 1, prob_num + 1 ):

    data_num = p00_data_num ( prob )

    print ( '  %7d  %9d' % ( prob, data_num ) )
#
#  Terminate.
#
  print ( '' )
  print ( 'p00_data_num_test:' )
  print ( '  Normal end of execution.' )
  return

def p00_data ( prob, dim_num, data_num ):

#*****************************************************************************80
#
## p00_data returns the data for any problem.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    29 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Input:
#
#    integer PROB, the problem index.
#
#    integer DIM_num, the spatial dimension of the dependent
#    variables.
#
#    integer DATA_num, the number of data points.
#
#  Output:
#
#    real P_data(DIM_num,DATA_num), the data.
#
  if ( prob == 1 ):
    p_data = p01_data ( dim_num, data_num )
  elif ( prob == 2 ):
    p_data = p02_data ( dim_num, data_num )
  elif ( prob == 3 ):
    p_data = p03_data ( dim_num, data_num )
  elif ( prob == 4 ):
    p_data = p04_data ( dim_num, data_num )
  elif ( prob == 5 ):
    p_data = p05_data ( dim_num, data_num )
  elif ( prob == 6 ):
    p_data = p06_data ( dim_num, data_num )
  elif ( prob == 7 ):
    p_data = p07_data ( dim_num, data_num )
  elif ( prob == 8 ):
    p_data = p08_data ( dim_num, data_num )
  else:
    print ( '' )
    print ( 'p00_data - Fatal error!' )
    print ( '  Unexpected input value of PROB.' )
    raise Exception ( 'p00_data - Fatal error!' )

  return p_data

def p01_data ( dim_num, data_num ):

#*****************************************************************************80
#
## p01_data returns the data for problem p01.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    29 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Input:
#
#    integer DIM_num, the spatial dimension of the dependent
#    variables.
#
#    integer DATA_num, the number of data points.
#
#  Output:
#
#    real P_data(DIM_num,DATA_num), the data.
#
  import numpy as np

  p_data = np.array ( [ \
    [  0.0, 4.0 ], \
    [  1.0, 5.0 ], \
    [  2.0, 6.0 ], \
    [  4.0, 6.0 ], \
    [  5.0, 5.0 ], \
    [  6.0, 3.0 ], \
    [  7.0, 1.0 ], \
    [  8.0, 1.0 ], \
    [  9.0, 1.0 ], \
    [ 10.0, 3.0 ], \
    [ 11.0, 4.0 ], \
    [ 12.0, 4.0 ], \
    [ 13.0, 3.0 ], \
    [ 14.0, 3.0 ], \
    [ 15.0, 4.0 ], \
    [ 16.0, 4.0 ], \
    [ 17.0, 3.0 ], \
    [ 18.0, 0.0 ] ] )

  p_data = np.transpose ( p_data )

  return p_data

def p02_data ( dim_num, data_num ):

#*****************************************************************************80
#
## p02_data returns the data for problem p02.
#
#  Discussion:
#
#    Two pairs of identical X values have now been slightly separated.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    29 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Input:
#
#    integer DIM_num, the spatial dimension of the dependent
#    variables.
#
#    integer DATA_num, the number of data points.
#
#  Output:
#
#    real P_data(DIM_num,DATA_num), the data.
#
  import numpy as np

  p_data = np.array ( [ \
   [  0.00,   0.00 ], \
   [  1.34,   5.00 ], \
   [  5.00,   8.66 ], \
   [ 10.00,  10.00 ], \
   [ 10.60,  10.40 ], \
   [ 10.70,  12.00 ], \
   [ 10.705, 28.60 ], \
   [ 10.80,  30.20 ], \
   [ 11.40,  30.60 ], \
   [ 19.60,  30.60 ], \
   [ 20.20,  30.20 ], \
   [ 20.295, 28.60 ], \
   [ 20.30,  12.00 ], \
   [ 20.40,  10.40 ], \
   [ 21.00,  10.00 ], \
   [ 26.00,   8.66 ], \
   [ 29.66,   5.00 ], \
   [ 31.00,   0.00 ] ] )

  p_data = np.transpose ( p_data )

  return p_data

def p03_data ( dim_num, data_num ):

#*****************************************************************************80
#
## p03_data returns the data for problem p03.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    29 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Input:
#
#    integer DIM_num, the spatial dimension of the dependent
#    variables.
#
#    integer DATA_num, the number of data points.
#
#  Output:
#
#    real P_data(DIM_num,DATA_num), the data.
#
  import numpy as np

  p_data = np.array ( [ \
    [  0.0,  0.0 ], \
    [  2.0, 10.0 ], \
    [  3.0, 10.0 ], \
    [  5.0, 10.0 ], \
    [  6.0, 10.0 ], \
    [  8.0, 10.0 ], \
    [  9.0, 10.5 ], \
    [ 11.0, 15.0 ], \
    [ 12.0, 50.0 ], \
    [ 14.0, 60.0 ], \
    [ 15.0, 85.0 ] ] )

  p_data = np.transpose ( p_data )

  return p_data

def p04_data ( dim_num, data_num ):

#*****************************************************************************80
#
## p04_data returns the data for problem p04.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    29 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Input:
#
#    integer DIM_num, the spatial dimension of the dependent
#    variables.
#
#    integer DATA_num, the number of data points.
#
#  Output:
#
#    real P_data(DIM_num,DATA_num), the data.
#
  import numpy as np

  p_data = np.array ( [ \
   [ 0.00,  0.00 ], \
   [ 0.05,  0.70 ], \
   [ 0.10,  1.00 ], \
   [ 0.20,  1.00 ], \
   [ 0.80,  0.30 ], \
   [ 0.85,  0.05 ], \
   [ 0.90,  0.10 ], \
   [ 1.00,  1.00 ] ] )

  p_data = np.transpose ( p_data )

  return p_data

def p05_data ( dim_num, data_num ):

#*****************************************************************************80
#
## p05_data returns the data for problem p05.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    29 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Input:
#
#    integer DIM_num, the spatial dimension of the dependent
#    variables.
#
#    integer DATA_num, the number of data points.
#
#  Output:
#
#    real P_data(DIM_num,DATA_num), the data.
#
  import numpy as np

  p_data = np.array ( [ \
    [ 0.00, 0.00 ], \
    [ 0.10, 0.90 ], \
    [ 0.20, 0.95 ], \
    [ 0.30, 0.90 ], \
    [ 0.40, 0.10 ], \
    [ 0.50, 0.05 ], \
    [ 0.60, 0.05 ], \
    [ 0.80, 0.20 ], \
    [ 1.00, 1.00 ] ] )

  p_data = np.transpose ( p_data )

  return p_data

def p06_data ( dim_num, data_num ):

#*****************************************************************************80
#
## p06_data returns the data for problem p06.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    29 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Input:
#
#    integer DIM_num, the spatial dimension of the dependent
#    variables.
#
#    integer DATA_num, the number of data points.
#
#  Output:
#
#    real P_data(DIM_num,DATA_num), the data.
#
  import numpy as np

  p_data = np.array ( [ \
   [ 595.0, 0.644 ], \
   [ 605.0, 0.622 ], \
   [ 615.0, 0.638 ], \
   [ 625.0, 0.649 ], \
   [ 635.0, 0.652 ], \
   [ 645.0, 0.639 ], \
   [ 655.0, 0.646 ], \
   [ 665.0, 0.657 ], \
   [ 675.0, 0.652 ], \
   [ 685.0, 0.655 ], \
   [ 695.0, 0.644 ], \
   [ 705.0, 0.663 ], \
   [ 715.0, 0.663 ], \
   [ 725.0, 0.668 ], \
   [ 735.0, 0.676 ], \
   [ 745.0, 0.676 ], \
   [ 755.0, 0.686 ], \
   [ 765.0, 0.679 ], \
   [ 775.0, 0.678 ], \
   [ 785.0, 0.683 ], \
   [ 795.0, 0.694 ], \
   [ 805.0, 0.699 ], \
   [ 815.0, 0.710 ], \
   [ 825.0, 0.730 ], \
   [ 835.0, 0.763 ], \
   [ 845.0, 0.812 ], \
   [ 855.0, 0.907 ], \
   [ 865.0, 1.044 ], \
   [ 875.0, 1.336 ], \
   [ 885.0, 1.881 ], \
   [ 895.0, 2.169 ], \
   [ 905.0, 2.075 ], \
   [ 915.0, 1.598 ], \
   [ 925.0, 1.211 ], \
   [ 935.0, 0.916 ], \
   [ 945.0, 0.746 ], \
   [ 955.0, 0.672 ], \
   [ 965.0, 0.627 ], \
   [ 975.0, 0.615 ], \
   [ 985.0, 0.607 ], \
   [ 995.0, 0.606 ], \
   [1005.0, 0.609 ], \
   [1015.0, 0.603 ], \
   [1025.0, 0.601 ], \
   [1035.0, 0.603 ], \
   [1045.0, 0.601 ], \
   [1055.0, 0.611 ], \
   [1065.0, 0.601 ], \
   [1075.0, 0.608 ] ] )

  p_data = np.transpose ( p_data )

  return p_data

def p07_data ( dim_num, data_num ):

#*****************************************************************************80
#
## p07_data returns the data for problem p07.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    29 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Input:
#
#    integer DIM_num, the spatial dimension of the dependent
#    variables.
#
#    integer DATA_num, the number of data points.
#
#  Output:
#
#    real P_data(DIM_num,DATA_num), the data.
#
  import numpy as np

  p_data = np.array ( [ \
   [ 0.0, 1.0 ], \
   [ 1.0, 2.0 ], \
   [ 4.0, 2.0 ], \
   [ 5.0, 1.0 ] ] )

  p_data = np.transpose ( p_data )

  return p_data

def p08_data ( dim_num, data_num ):

#*****************************************************************************80
#
## p08_data returns the data for problem p08.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    29 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Input:
#
#    integer DIM_num, the spatial dimension of the dependent
#    variables.
#
#    integer DATA_num, the number of data points.
#
#  Output:
#
#    real P_data(DIM_num,DATA_num), the data.
#
  import numpy as np

  p_data = np.array ( [ \
   [ -1.0, 1.00 ], \
   [ -0.8, 0.64 ], \
   [ -0.6, 0.36 ], \
   [ -0.4, 0.16 ], \
   [ -0.2, 0.04 ], \
   [  0.0, 0.00 ], \
   [  0.2, 0.04 ], \
   [  0.20001, 0.05 ], \
   [  0.4, 0.16 ], \
   [  0.6, 0.36 ], \
   [  0.8, 0.64 ], \
   [  1.0, 1.00 ] ] )

  p_data = np.transpose ( p_data )

  return p_data

def p00_data_test ( ):

#*****************************************************************************80
#
## p00_data_test() tests p00_data.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    29 June 2015
#
#  Author:
#
#    John Burkardt
#
  import platform

  print ( '' )
  print ( 'p00_data_test() tests p00_data' )
  print ( '  Python version: %s' % ( platform.python_version ( ) ) )
  print ( '  p00_data returns the actual (MxN) data for any problem.' )

  prob_num = p00_prob_num ( )

  for prob in range ( 1, prob_num + 1 ):

    print ( '' )
    print ( '  Problem %d' % ( prob ) )

    data_num = p00_data_num ( prob )
    print ( '  DATA_num = %d' % ( data_num ) )

    dim_num = p00_dim_num ( prob )
    print ( '  DIM_num  = %d' % ( dim_num ) )

    p = p00_data ( prob, dim_num, data_num )

    r8mat_transpose_print ( dim_num, data_num, p, '  Data array:' )
#
#  Terminate.
#
  print ( '' )
  print ( 'p00_data_test:' )
  print ( '  Normal end of execution.' )
  return

def p00_dim_num ( prob ):

#*****************************************************************************80
#
## p00_dim_num returns the spatial dimension for any problem.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    28 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Input:
#
#    integer PROB, the problem index.
#
#  Output:
#
#    integer DIM_num, the spatial dimension of the
#    dependent variables.
#
  if ( prob == 1 ):
    dim_num = p01_dim_num ( )
  elif ( prob == 2 ):
    dim_num = p02_dim_num ( )
  elif ( prob == 3 ):
    dim_num = p03_dim_num ( )
  elif ( prob == 4 ):
    dim_num = p04_dim_num ( )
  elif ( prob == 5 ):
    dim_num = p05_dim_num ( )
  elif ( prob == 6 ):
    dim_num = p06_dim_num ( )
  elif ( prob == 7 ):
    dim_num = p07_dim_num ( )
  elif ( prob == 8 ):
    dim_num = p08_dim_num ( )
  else:
    print ( '' )
    print ( 'p00_dim_num - Fatal error!' )
    print ( '  Unexpected input value of PROB.' )
    raise Exception ( 'p00_dim_num - Fatal error!' )

  return dim_num

def p01_dim_num ( ):

#*****************************************************************************80
#
## p01_dim_num returns the spatial dimension for problem p01.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    28 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Output:
#
#    integer DIM_num, the spatial dimension of the
#    dependent variables.
#
  dim_num = 2

  return dim_num

def p02_dim_num ( ):

#*****************************************************************************80
#
## p02_dim_num returns the spatial dimension for problem p02.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    28 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Output:
#
#    integer DIM_num, the spatial dimension of the
#    dependent variables.
#
  dim_num = 2

  return dim_num

def p03_dim_num ( ):

#*****************************************************************************80
#
## p03_dim_num returns the spatial dimension for problem p03.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    28 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Output:
#
#    integer DIM_num, the spatial dimension of the
#    dependent variables.
#
  dim_num = 2

  return dim_num

def p04_dim_num ( ):

#*****************************************************************************80
#
## p04_dim_num returns the spatial dimension for problem p04.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    28 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Output:
#
#    integer DIM_num, the spatial dimension of the
#    dependent variables.
#
  dim_num = 2

  return dim_num

def p05_dim_num ( ):

#*****************************************************************************80
#
## p05_dim_num returns the spatial dimension for problem p05.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    28 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Output:
#
#    integer DIM_num, the spatial dimension of the
#    dependent variables.
#
  dim_num = 2

  return dim_num

def p06_dim_num ( ):

#*****************************************************************************80
#
## p06_dim_num returns the spatial dimension for problem p06.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    28 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Output:
#
#    integer DIM_num, the spatial dimension of the
#    dependent variables.
#
  dim_num = 2

  return dim_num

def p07_dim_num ( ):

#*****************************************************************************80
#
## p07_dim_num returns the spatial dimension for problem p07.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    28 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Output:
#
#    integer DIM_num, the spatial dimension of the
#    dependent variables.
#
  dim_num = 2

  return dim_num

def p08_dim_num ( ):

#*****************************************************************************80
#
## p08_dim_num returns the spatial dimension for problem p08.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    28 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Output:
#
#    integer DIM_num, the spatial dimension of the
#    dependent variables.
#
  dim_num = 2

  return dim_num

def p00_dim_num_test ( ):

#*****************************************************************************80
#
## p00_dim_num_test() tests p00_dim_num.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    28 June 2015
#
#  Author:
#
#    John Burkardt
#
  import platform

  print ( '' )
  print ( 'p00_dim_num_test' )
  print ( '  Python version: %s' % ( platform.python_version ( ) ) )
  print ( '  p00_dim_num returns the spatial dimension for any problem.' )
  print ( '' )
  print ( '  Problem  Dimension' )
  print ( '' )

  prob_num = p00_prob_num ( )

  for prob in range ( 1, prob_num + 1 ):

    dim_num = p00_dim_num ( prob )

    print ( '  %7d  %9d' % ( prob, dim_num ) )
#
#  Terminate.
#
  print ( '' )
  print ( 'p00_dim_num_test:' )
  print ( '  Normal end of execution.' )
  return

def p00_plot ( prob ):

#*****************************************************************************80
#
## p00_plot plots the data for any of the tests.
#
#  Discussion:
#
#    For now we assume that the data dimension is 2, so that we are simply
#    creating a single X-Y plot.
#
#    Python3 is giving me grief about the variable "prob", which I now
#    am renaming to "problem".
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    20 July 2012
#
#  Author:
#
#    John Burkardt
#
#  Input:
#
#    integer PROB, the problem index.
#
  import matplotlib.pyplot as plt
  import numpy as np

  prob_num = p00_prob_num ( )

  if ( ( prob < 1 ) or ( prob_num < prob ) ):
    print ( '' )
    print ( 'p00_plot - Fatal error!' )
    print ( '  Values of PROB must be between 1 and %d.' % ( prob_num ) )
    raise Exception ( 'p00_plot - Fatal error!' )

  data_num = p00_data_num ( prob )

  dim_num = p00_dim_num ( prob )
 
  p = p00_data ( prob, dim_num, data_num )

  x = p[0,:]
  y = p[1,:]

  t = 'test_interp Data Set #' + str ( prob )
  filename = 'p0' + str ( prob ) + '_plot.png'
#
#  PYLAB commands.
#
  plt.plot ( x, y, linewidth = 2.0 )
  plt.plot ( x, y, 'r.', markersize = 25 )
  plt.title ( t )
  plt.grid ( True )
  plt.xlabel ( '<---X--->' )
  plt.ylabel ( '<---Y--->' )

  plt.savefig ( filename )
  plt.show ( block = False )
  plt.close ( )

  return filename

def p00_plot_test ( ):

#*****************************************************************************80
#
## p00_plot_test() tests p00_plot.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    29 June 2015
#
#  Author:
#
#    John Burkardt
#
  import platform

  print ( '' )
  print ( 'p00_plot_test' )
  print ( '  Python version: %s' % ( platform.python_version ( ) ) )
  print ( '  p00_plot plots any test problem.' )

  num = p00_prob_num ( )
  print ( '' )
  print ( '  test_interp includes %d test problems.' % ( num ) )

  print ( '' )
  for prob in range ( 1, num + 1 ):
    filename = p00_plot ( prob )
    print ( '  # %d  "%s"' % ( prob, filename ) )
#
#  Terminate.
#
  print ( '' )
  print ( 'p00_plot_test:' )
  print ( '  Normal end of execution.' )
  return

def p00_prob_num ( ):

#*****************************************************************************80
#
## p00_prob_num returns the number of problems.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    27 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Output:
#
#    integer VALUE, the number of problems.
#
  value = 8

  return value

def p00_prob_num_test ( ):

#*****************************************************************************80
#
## p00_prob_num_test() tests p00_prob_num.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    27 June 2015
#
#  Author:
#
#    John Burkardt
#
  import platform

  print ( '' )
  print ( 'p00_prob_num_test' )
  print ( '  Python version: %s' % ( platform.python_version ( ) ) )
  print ( '  p00_prob_num returns the number of test problems.' )

  num = p00_prob_num ( )

  print ( '' )
  print ( '  test_interp includes %d test problems.' % ( num ) )
#
#  Terminate.
#
  print ( '' )
  print ( 'p00_prob_num_test:' )
  print ( '  Normal end of execution.' )
  return

def p00_story ( prob ):

#*****************************************************************************80
#
## p00_story prints the "story" for any problem.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    28 June 2015
#
#  Author:
#
#    John Burkardt
#
  if ( prob == 1 ):
    p01_story ( )
  elif ( prob == 2 ):
    p02_story ( )
  elif ( prob == 3 ):
    p03_story ( )
  elif ( prob == 4 ):
    p04_story ( )
  elif ( prob == 5 ):
    p05_story ( )
  elif ( prob == 6 ):
    p06_story ( )
  elif ( prob == 7 ):
    p07_story ( )
  elif ( prob == 8 ):
    p08_story ( )
  else:
    print ( '' )
    print ( 'p00_story - Fatal error!' )
    print ( '  Unexpected input value of PROB.' )
    raise Exception ( 'p00_story - Fatal error!' )

  return

def p01_story ( ):

#*****************************************************************************80
#
## p01_story prints the "story" for problem p01.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    28 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Reference:
#
#    Hans-Joerg Wenz,
#    Interpolation of Curve Data by Blended Generalized Circles,
#    Computer Aided Geometric Design,
#    Volume 13, Number 8, November 1996, pages 673-680.
#
  print ( '' )
  print ( '  This example is due to Hans-Joerg Wenz.' )
  print ( '  It is an example of good data, which is dense enough in areas' )
  print ( '  where the expected curvature of the interpolant is large.' )
  print ( '  Good results can be expected with almost any reasonable' )
  print ( '  interpolation method.' )

  return

def p02_story ( ):

#*****************************************************************************80
#
## p02_story prints the "story" for problem p02.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    28 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Reference:
#
#    ETY Lee,
#    Choosing Nodes in Parametric Curve Interpolation,
#    Computer-Aided Design,
#    Volume 21, Number 6, July/August 1989, pages 363-370.
#
  print ( '' )
  print ( '  This example is due to ETY Lee of Boeing.' )
  print ( '  Data near the corners is more dense than in regions of small curvature.' )
  print ( '  A local interpolation method will produce a more plausible' )
  print ( '  interpolant than a nonlocal interpolation method, such as' )
  print ( '  cubic splines.' )

  return

def p03_story ( ):

#*****************************************************************************80
#
## p03_story prints the "story" for problem p03.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    28 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Reference:
#
#    Fred Fritsch, Ralph Carlson,
#    Monotone Piecewise Cubic Interpolation,
#    SIAM Journal on Numerical Analysis,
#    Volume 17, Number 2, April 1980, pages 238-246.
#
  print ( '' )
  print ( '  This example is due to Fred Fritsch and Ralph Carlson.' )
  print ( '  This data can cause problems for interpolation methods.' )
  print ( '  There are sudden changes in direction, and at the same time,' )
  print ( '  sparsely-placed data.  This can cause an interpolant to overshoot' )
  print ( '  the data in a way that seems implausible.' )

  return

def p04_story ( ):

#*****************************************************************************80
#
## p04_story prints the "story" for problem p04.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    28 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Reference:
#
#    Larry Irvine, Samuel Marin, Philip Smith,
#    Constrained Interpolation and Smoothing,
#    Constructive Approximation,
#    Volume 2, Number 1, December 1986, pages 129-151.
#
  print ( '' )
  print ( '  This example is due to Larry Irvine, Samuel Marin and Philip Smith.' )
  print ( '  This data can cause problems for interpolation methods.' )
  print ( '  There are sudden changes in direction, and at the same time,' )
  print ( '  sparsely-placed data.  This can cause an interpolant to overshoot' )
  print ( '  the data in a way that seems implausible.' )

  return

def p05_story ( ):

#*****************************************************************************80
#
## p05_story prints the "story" for problem p05.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    28 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Reference:
#
#    Larry Irvine, Samuel Marin, Philip Smith,
#    Constrained Interpolation and Smoothing,
#    Constructive Approximation,
#    Volume 2, Number 1, December 1986, pages 129-151.
#
  print ( '' )
  print ( '  This example is due to Larry Irvine, Samuel Marin and Philip Smith.' )
  print ( '  This data can cause problems for interpolation methods.' )
  print ( '  There are sudden changes in direction, and at the same time,' )
  print ( '  sparsely-placed data.  This can cause an interpolant to overshoot' )
  print ( '  the data in a way that seems implausible.' )

  return

def p06_story ( ):

#*****************************************************************************80
#
## p06_story prints the "story" for problem p06.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    28 June 2015
#
#  Author:
#
#    John Burkardt
#
#  Reference:
#
#    Carl DeBoor, John Rice,
#    Least-squares cubic spline approximation II - variable knots.
#    Technical Report CSD TR 21,
#    Purdue University, Lafayette, Indiana, 1968.
#
#    Carl DeBoor,
#    A Practical Guide to Splines,
#    Springer, 2001,
#    ISBN: 0387953663,
#    LC: QA1.A647.v27.
#
  print ( '' )
  print ( '  The data is due to Carl deBoor and John Rice.' )
  print ( '  The data represents a temperature dependent property of titanium.' )
  print ( '  The data has been used extensively as an example in spline' )
  print ( '  approximation with variably-spaced knots.' )
  print ( '  DeBoor considers two sets of knots:' )
  print ( '  (595,675,755,835,915,995,1075)' )
  print ( '  and' )
  print ( '  (595,725,850,910,975,1040,1075).' )

  return

def p07_story ( ):

#*****************************************************************************80
#
## p07_story prints the "story" for problem p07.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    28 June 2015
#
#  Author:
#
#    John Burkardt
#
  print ( '' )
  print ( '  This data is a simple symmetric set of 4 points,' )
  print ( '  for which it is interesting to develop the Shepard' )
  print ( '  interpolants for varying values of the exponent p.' )

  return

def p08_story ( ):

#*****************************************************************************80
#
## p08_story prints the "story" for problem p08.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    28 June 2015
#
#  Author:
#
#    John Burkardt
#
  print ( '' )
  print ( '  This is equally spaced data for y = x^2,' )
  print ( '  except for one extra point whose x value is' )
  print ( '  close to another, but whose y value is not so close.' )
  print ( '  A small disagreement in nearby data can be a disaster.' )
  return

def p00_story_test ( ):

#*****************************************************************************80
#
## p00_story_test() tests p00_story.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    28 June 2015
#
#  Author:
#
#    John Burkardt
#
  import platform

  print ( '' )
  print ( 'p00_story_test' )
  print ( '  Python version: %s' % ( platform.python_version ( ) ) )
  print ( '  p00_story prints the "story" for any problem.' )

  prob_num = p00_prob_num ( )

  for prob in range ( 1, prob_num + 1 ):

    print ( '' )
    print ( '  Problem %d' % ( prob ) )

    p00_story ( prob )
#
#  Terminate.
#
  print ( '' )
  print ( 'p00_story_test:' )
  print ( '  Normal end of execution.' )
  return

def r8mat_transpose_print ( m, n, a, title ):

#*****************************************************************************80
#
## r8mat_transpose_print prints an R8MAT, transposed.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    31 August 2014
#
#  Author:
#
#    John Burkardt
#
#  Input:
#
#    integer M, the number of rows in A.
#
#    integer N, the number of columns in A.
#
#    real A(M,N), the matrix.
#
#    string TITLE, a title.
#
  r8mat_transpose_print_some ( m, n, a, 0, 0, m - 1, n - 1, title )

  return

def r8mat_transpose_print_test ( ):

#*****************************************************************************80
#
## r8mat_transpose_print_test() tests r8mat_transpose_print.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    31 October 2014
#
#  Author:
#
#    John Burkardt
#
  import numpy as np
  import platform

  print ( '' )
  print ( 'r8mat_transpose_print_test' )
  print ( '  Python version: %s' % ( platform.python_version ( ) ) )
  print ( '  r8mat_transpose_print prints an R8MAT.' )

  m = 4
  n = 3
  v = np.array ( [ \
    [ 11.0, 12.0, 13.0 ], 
    [ 21.0, 22.0, 23.0 ], 
    [ 31.0, 32.0, 33.0 ], 
    [ 41.0, 42.0, 43.0 ] ], dtype = np.float64 )
  r8mat_transpose_print ( m, n, v, '  Here is an R8MAT, transposed:' )
#
#  Terminate.
#
  print ( '' )
  print ( 'r8mat_transpose_print_test:' )
  print ( '  Normal end of execution.' )
  return

def r8mat_transpose_print_some ( m, n, a, ilo, jlo, ihi, jhi, title ):

#*****************************************************************************80
#
## r8mat_transpose_print_some prints a portion of an R8MAT, transposed.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    13 November 2014
#
#  Author:
#
#    John Burkardt
#
#  Input:
#
#    integer M, N, the number of rows and columns of the matrix.
#
#    real A(M,N), an M by N matrix to be printed.
#
#    integer ILO, JLO, the first row and column to print.
#
#    integer IHI, JHI, the last row and column to print.
#
#    string TITLE, a title.
#
  incx = 5

  print ( '' )
  print ( title )

  if ( m <= 0 or n <= 0 ):
    print ( '' )
    print ( '  (None)' )
    return

  for i2lo in range ( max ( ilo, 0 ), min ( ihi, m - 1 ), incx ):

    i2hi = i2lo + incx - 1
    i2hi = min ( i2hi, m - 1 )
    i2hi = min ( i2hi, ihi )
    
    print ( '' )
    print ( '  Row: ' ),

    for i in range ( i2lo, i2hi + 1 ):
      print ( '%7d       ' % ( i ) ),

    print ( '' )
    print ( '  Col' )

    j2lo = max ( jlo, 0 )
    j2hi = min ( jhi, n - 1 )

    for j in range ( j2lo, j2hi + 1 ):

      print ( '%7d :' % ( j ) ),
      
      for i in range ( i2lo, i2hi + 1 ):
        print ( '%12g  ' % ( a[i,j] ) ),

      print ( '' )

  return

def r8mat_transpose_print_some_test ( ):

#*****************************************************************************80
#
## r8mat_transpose_print_some_test() tests r8mat_transpose_print_some.
#
#  Licensing:
#
#    This code is distributed under the MIT license.
#
#  Modified:
#
#    31 October 2014
#
#  Author:
#
#    John Burkardt
#
  import numpy as np
  import platform

  print ( '' )
  print ( 'r8mat_transpose_print_some_test' )
  print ( '  Python version: %s' % ( platform.python_version ( ) ) )
  print ( '  r8mat_transpose_print_some prints some of an R8MAT, transposed.' )

  m = 4
  n = 6
  v = np.array ( [ \
    [ 11.0, 12.0, 13.0, 14.0, 15.0, 16.0 ], 
    [ 21.0, 22.0, 23.0, 24.0, 25.0, 26.0 ], 
    [ 31.0, 32.0, 33.0, 34.0, 35.0, 36.0 ], 
    [ 41.0, 42.0, 43.0, 44.0, 45.0, 46.0 ] ], dtype = np.float64 )
  r8mat_transpose_print_some ( m, n, v, 0, 3, 2, 5, '  R8MAT, rows 0:2, cols 3:5:' )
#
#  Terminate.
#
  print ( '' )
  print ( 'r8mat_transpose_print_some_test:' )
  print ( '  Normal end of execution.' )
  return

def test_interp_test ( ):

#*****************************************************************************80
#
## test_interp_test() tests test_interp().
#
#  Licensing:
#
#    This code is distributed under the MIT license. 
#
#  Modified:
#
#    29 June 2015
#
#  Author:
#
#    John Burkardt
#
  import platform

  print ( '' )
  print ( 'test_interp_test():' )
  print ( '  Python version: %s' % ( platform.python_version ( ) ) )
  print ( '  Test test_interp().' )
#
#  Utility functions.
#
  r8mat_transpose_print_test ( )
  r8mat_transpose_print_some_test ( )
#
#  Library functions.
#
  p00_prob_num_test ( )
  p00_story_test ( )
  p00_dim_num_test ( )
  p00_data_num_test ( )
  p00_data_test ( )
  p00_plot_test ( )
#
#  Terminate.
#
  print ( '' )
  print ( 'test_interp_test():' )
  print ( '  Normal end of execution.' )
  return

def timestamp ( ):

#*****************************************************************************80
#
## timestamp() prints the date as a timestamp.
#
#  Licensing:
#
#    This code is distributed under the MIT license. 
#
#  Modified:
#
#    06 April 2013
#
#  Author:
#
#    John Burkardt
#
  import time

  t = time.time ( )
  print ( time.ctime ( t ) )

  return None

if ( __name__ == '__main__' ):
  timestamp ( )
  test_interp_test ( )
  timestamp ( )