function von_mises_sample_test ( )

%*****************************************************************************80
%
%% von_mises_sample_test() tests von_mises_sample().
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    04 April 2016
%
%  Author:
%
%    John Burkardt
%
  nsample = 1000;

  fprintf ( 1, '\n' );
  fprintf ( 1, 'von_mises_sample_test():\n' );
  fprintf ( 1, '  von_mises_mean() computes the Von Mises mean;\n' );
  fprintf ( 1, '  von_mises_sample() samples the Von Mises distribution.\n' );
  fprintf ( 1, ...
    '  von_mises_circular_variance() computes the Von Mises circular variance;\n' );

  a = 1.0;
  b = 2.0;

  fprintf ( 1, '\n' );
  fprintf ( 1, '  PDF parameter A =             %14g\n', a );
  fprintf ( 1, '  PDF parameter B =             %14g\n', b );

  check = von_mises_check ( a, b );

  if ( ~ check );
    fprintf ( 1, '\n' );
    fprintf ( 1, 'VON_MISES_SAMPLE_TEST(): Fatal error!\n' );
    fprintf ( 1, '  The parameters are not legal.\n' );
    return
  end

  xmean = von_mises_mean ( a, b );
  variance = von_mises_circular_variance ( a, b );

  fprintf ( 1, '  PDF mean =              %14g\n', xmean );
  fprintf ( 1, '  PDF circular variance = %14g\n', variance );

  for i = 1 : nsample
    x(i) = von_mises_sample ( a, b );
  end

  xmean = mean ( x );
  variance = r8vec_circular_variance ( nsample, x );
  xmax = max ( x );
  xmin = min ( x );

  fprintf ( 1, '\n' );
  fprintf ( 1, '  Sample size =              %6d\n', nsample );
  fprintf ( 1, '  Sample mean =              %14g\n', xmean );
  fprintf ( 1, '  Sample circular variance = %14g\n', variance );
  fprintf ( 1, '  Sample maximum =           %14g\n', xmax );
  fprintf ( 1, '  Sample minimum =           %14g\n', xmin );

  return
end
