#! /usr/bin/env python
#
def r8st_transpose ( m, n, nst, ist, jst, ast ):

#*****************************************************************************80
#
## R8ST_TRANSPOSE transposes an R8ST matrix.
#
#  Licensing:
#
#    This code is distributed under the GNU LGPL license.
#
#  Modified:
#
#    27 September 2018
#
#  Author:
#
#    John Burkardt
#
#  Parameters:
#
#    Input/output, integer M, the number of row.
#
#    Input/output, integer N, the number of columns.
#
#    Input/output, integer NST, the number of nonzeros.
#
#    Input/output, integer IST(NST), JST(NST), the row and column indices.
#
#    Input/output, real AST(NST), the nonzero values.
#
  t = m
  m = n
  n = t

  t = ist.copy ( )
  ist = jst.copy ( )
  jst = t.copy ( )

  return m, n, nst, ist, jst, ast

def r8st_transpose_test ( ):

#*****************************************************************************80
#
## R8ST_TRANSPOSE_TEST tests R8ST_TRANSPOSE.
#
#  Discussion:
#
#    The matrix is:
#
#      11  12   0   0  15
#      21  22   0   0   0
#       0   0  33   0  35
#       0   0   0  44   0
#      51   0  53   0  55
#
#  Licensing:
#
#    This code is distributed under the GNU LGPL license.
#
#  Modified:
#
#    26 September 2018
#
#  Author:
#
#    John Burkardt
#
  import numpy as np
  import platform
  from r8st_print import r8st_print

  m = 5
  n = 5
  nst = 11
  ast = np.array ( [ 51.0, 12.0, 11.0, 33.0, 15.0, 53.0, 55.0, 22.0, 35.0, 44.0, 21.0 ] )
  ist = np.array ( [ 5, 1, 1, 3, 1, 5, 5, 2, 3, 4, 2 ] )
  jst = np.array ( [ 1, 2, 1, 3, 5, 3, 5, 2, 5, 4, 1 ] )

  print ( '' )
  print ( 'R8ST_TRANSPOSE_TEST' )
  print ( '  Python version: %s' % ( platform.python_version ( ) ) )
  print ( '  R8ST_TRANSPOSE transposes an R8ST matrix.' )

  r8st_print ( m, n, nst, ist, jst, ast, '  R8ST Matrix data:' )

  mt, nt, nstt, istt, jstt, astt = r8st_transpose ( m, n, nst, ist, jst, ast )

  r8st_print ( mt, nt, nstt, istt, jstt, astt, '  Transposed matrix:' )
#
#  Terminate.
#
  print ( '' )
  print ( 'R8ST_TRANSPOSE_TEST:' )
  print ( '  Normal end of execution.' )
  return

if ( __name__ == '__main__' ):
  from timestamp import timestamp
  timestamp ( )
  r8st_transpose_test ( )
  timestamp ( )