function semicircular_sample_test ( )

%*****************************************************************************80
%
%% semicircular_sample_test() tests semicircular_sample().
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    14 February 2003
%
%  Author:
%
%    John Burkardt
%
  nsample = 1000;

  fprintf ( 1, '\n' );
  fprintf ( 1, 'SEMICIRCULAR_SAMPLE_TEST():\n' );
  fprintf ( 1, '  SEMICIRCULAR_MEAN() computes the Semicircular mean;\n' );
  fprintf ( 1, '  SEMICIRCULAR_SAMPLE() samples the Semicircular distribution;\n' );
  fprintf ( 1, '  SEMICIRCULAR_VARIANCE() computes the Semicircular variance.\n' );

  a = 3.0;
  b = 2.0;

  check = semicircular_check ( a, b );

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

  xmean = semicircular_mean ( a, b );
  variance = semicircular_variance ( a, b );

  fprintf ( 1, '\n' );
  fprintf ( 1, '  PDF parameter A =             %14f\n', a );
  fprintf ( 1, '  PDF parameter B =             %14f\n', b );
  fprintf ( 1, '  PDF mean =                    %14f\n', xmean );
  fprintf ( 1, '  PDF variance =                %14f\n', variance );
  
  for i = 1 : nsample
    x(i) = semicircular_sample ( a, b );
  end

  xmean = mean ( x );
  variance = r8vec_variance ( nsample, x );
  xmax = max ( x );
  xmin = min ( x );

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

  return
end
