function f_sample_test ( ) %*****************************************************************************80 % %% F_SAMPLE_TEST tests F_SAMPLE. % % Licensing: % % This code is distributed under the GNU LGPL license. % % Modified: % % 15 April 2009 % % Author: % % John Burkardt % nsample = 1000; seed = 123456789; fprintf ( 1, '\n' ); fprintf ( 1, 'F_SAMPLE_TEST\n' ); fprintf ( 1, ' F_MEAN computes the F mean;\n' ); fprintf ( 1, ' F_SAMPLE samples the F distribution;\n' ); fprintf ( 1, ' F_VARIANCE computes the F variance.\n' ); m = 8; n = 6; if ( ~ f_check ( m, n ) ) fprintf ( 1, '\n' ); fprintf ( 1, 'F_SAMPLE_TEST - Fatal error!\n' ); fprintf ( 1, ' The parameters are not legal!\n' ); return end mean = f_mean ( m, n ); variance = f_variance ( m, n ); fprintf ( 1, '\n' ); fprintf ( 1, ' PDF parameter M = %6d\n', m ); fprintf ( 1, ' PDF parameter N = %6d\n', n ); fprintf ( 1, ' PDF mean = %14g\n', mean ); fprintf ( 1, ' PDF variance = %14g\n', variance ); for i = 1 : nsample [ x(i), seed ] = f_sample ( m, n, 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 ); return end