function dipole_cdf_test ( ) %*****************************************************************************80 % %% DIPOLE_CDF_TEST tests DIPOLE_CDF, DIPOLE_CDF_INV, DIPOLE_PDF. % % Licensing: % % This code is distributed under the GNU LGPL license. % % Modified: % % 15 April 2009 % % Author: % % John Burkardt % ntest = 3; fprintf ( 1, '\n' ); fprintf ( 1, 'DIPOLE_CDF_TEST\n' ); fprintf ( 1, ' DIPOLE_CDF evaluates the Dipole CDF.\n' ); fprintf ( 1, ' DIPOLE_CDF_INV inverts the Dipole CDF.\n' ); fprintf ( 1, ' DIPOLE_PDF evaluates the Dipole PDF.\n' ); atest(1:3) = [ 0.0, pi / 4.0, pi / 2.0 ]; btest(1:3) = [ 1.0, 0.5, 0.0 ]; for itest = 1 : ntest a = atest(itest); b = btest(itest); check = dipole_check ( a, b ); if ( ~check ); fprintf ( 1, '\n' ); fprintf ( 1, 'DIPOLE_CDF_TEST - Fatal error!\n' ); fprintf ( 1, ' The parameters are not legal.\n' ); return end fprintf ( 1, '\n' ); fprintf ( 1, ' PDF parameter A = %14g\n', a ); fprintf ( 1, ' PDF parameter B = %14g\n', b ); seed = 123456789; fprintf ( 1, '\n' ); fprintf ( 1, ' X PDF CDF CDF_INV\n' ); fprintf ( 1, '\n' ); for i = 1 : 10 [ x, seed ] = dipole_sample ( a, b, seed ); pdf = dipole_pdf ( x, a, b ); cdf = dipole_cdf ( x, a, b ); x2 = dipole_cdf_inv ( cdf, a, b ); fprintf ( 1, ' %14g %14g %14g %14g\n', x, pdf, cdf, x2 ); end end return end