function dipole_sample_test ( ) %*****************************************************************************80 % %% DIPOLE_SAMPLE_TEST tests DIPOLE_SAMPLE. % % Licensing: % % This code is distributed under the GNU LGPL license. % % Modified: % % 15 April 2009 % % Author: % % John Burkardt % nsample = 1000; ntest = 3; seed = 123456789; fprintf ( 1, '\n' ); fprintf ( 1, 'DIPOLE_SAMPLE_TEST\n' ); fprintf ( 1, ' DIPOLE_SAMPLE samples the Dipole distribution.\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_SAMPLE_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 ); for i = 1 : nsample [ x(i), seed ] = dipole_sample ( a, b, seed ); end mean = r8vec_mean ( nsample, x ); variance = r8vec_variance ( nsample, x ); xmax = max ( x(1:nsample) ); xmin = min ( x(1:nsample) ); fprintf ( 1, '\n' ); fprintf ( 1, ' Sample size = %6d\n', nsample ); fprintf ( 1, ' Sample mean = %14g\n', mean ); fprintf ( 1, ' Sample variance = %14g\n', variance ); fprintf ( 1, ' Sample maximum = %14g\n', xmax ); fprintf ( 1, ' Sample minimum = %14g\n', xmin ); end return end