function asa109_test02 ( )

%*****************************************************************************80
%
%% ASA109_TEST02 demonstrates the use of BETA_INC_VALUES.
%
%  Licensing:
%
%    This code is distributed under the GNU LGPL license.
%
%  Modified:
%
%    25 September 2014
%
%  Author:
%
%    John Burkardt
%
  fprintf ( 1, '\n' );
  fprintf ( 1, 'ASA109_TEST02:\n' );
  fprintf ( 1, '  BETA_INC_VALUES stores values of\n' );
  fprintf ( 1, '  the incomplete Beta function.\n' );
  fprintf ( 1, '\n' );
  fprintf ( 1, '      A            B            X            BETA_INC(A,B)(X)\n' );
  fprintf ( 1, '\n' );

  n_data = 0;

  while ( 1 )

     [ n_data, a, b, x, fx ] = beta_inc_values ( n_data );

    if ( n_data == 0 )
      break
    end

    beta_log = gammaln ( a ) ...
             + gammaln ( b ) ...
             - gammaln ( a + b );

    [ fx2, ifault ] = betain ( x, a, b, beta_log );

    fprintf ( 1, '  %6.2f  %6.2f  %10.4f  %24.16e  %24.16e  %10.4e\n', ...
      a, b, x, fx, fx2, abs ( fx - fx2 ) );

  end

  return
end
