function normal_sample_test ( ) %*****************************************************************************80 % %% NORMAL_SAMPLE_TEST tests NORMAL_MEAN, NORMAL_SAMPLE, NORMAL_VARIANCE. % % Licensing: % % This code is distributed under the GNU LGPL license. % % Modified: % % 14 February 2003 % % Author: % % John Burkardt % nsample = 1000; seed = 123456789; fprintf ( 1, '\n' ); fprintf ( 1, 'NORMAL_SAMPLE_TEST\n' ); fprintf ( 1, ' NORMAL_MEAN computes the Normal mean;\n' ); fprintf ( 1, ' NORMAL_SAMPLES samples the Normal distribution;\n' ); fprintf ( 1, ' NORMAL_VARIANCE returns the Normal variance.\n' ); mu = 100.0; sigma = 15.0; check = normal_check ( mu, sigma ); if ( ~ check ); fprintf ( 1, '\n' ); fprintf ( 1, 'NORMAL_SAMPLE_TEST - Fatal error!\n' ); fprintf ( 1, ' The parameters are not legal.\n' ); return end mean = normal_mean ( mu, sigma ); variance = normal_variance ( mu, sigma ); fprintf ( 1, '\n' ); fprintf ( 1, ' PDF parameter MU = %14g\n', mu ); fprintf ( 1, ' PDF parameter SIGMA = %14g\n', sigma ); fprintf ( 1, ' PDF mean = %14g\n', mean ); fprintf ( 1, ' PDF variance = %14g\n', variance ); [ x, seed ] = normal_samples ( nsample, mu, sigma, seed ); 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 ); return end