Mercurial > octave

annotate scripts/statistics/tests/t_test_2.m @ 21633:dcf8922b724b

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Deprecate printf, puts, and scanf. Make fputs a M-file. * libinterp/corefcn/file-io.cc: extracted printf, puts, and scanf to M-files. * scripts/deprecated/printf.m: new function, equivalent to version file-io.cc. * scripts/deprecated/puts.m: new function, equivalent to version file-io.cc. * scripts/deprecated/scanf.m: new function, equivalent to version file-io.cc. * scripts/deprecated/module.mk: added printf, puts, and scanf. * scripts/io/fputs.m: new function, equivalent to version file-io.cc. * scripts/io/module.mk: added fputs. * doc/interpreter/io.txi: adapted documentation to current implementation. * NEWS: announced changes. * doc/interpreter/basics.txi: replaced printf by fprintf. * doc/interpreter/stmt.txi: replaced printf by fprintf. * doc/interpreter/var.txi: replaced printf by fprintf. * doc/refcard/refcard.tex: removed printf and scanf. * examples/code/@FIRfilter/display.m: replaced printf by fprintf. * examples/code/@polynomial/display.m: replaced printf by fprintf. * scripts/@ftp/display.m: replaced printf by fprintf. * scripts/general/inputParser.m: replaced printf by fprintf. * scripts/general/methods.m: replaced printf by fprintf. * scripts/general/profexplore.m: replaced printf by fprintf. * scripts/general/profshow.m: replaced printf by fprintf. * scripts/help/help.m: replaced puts by fputs and printf by fprintf. * scripts/help/lookfor.m: replaced puts by fputs and printf by fprintf. * scripts/help/which.m: replaced printf by fprintf. * scripts/image/imformats.m: replaced printf by fprintf. * scripts/io/beep.m: replaced puts by fputs. * scripts/io/textread.m: replaced printf by fprintf. * scripts/java/javaclasspath.m: replaced printf by fprintf. * scripts/java/javamem.m: replaced printf by fprintf. * scripts/miscellaneous/dir.m: replaced printf by fprintf. * scripts/miscellaneous/dos.m: replaced printf by fprintf. * scripts/miscellaneous/fact.m: replaced printf by fprintf. * scripts/miscellaneous/info.m: replaced printf by fprintf. * scripts/miscellaneous/license.m: replaced printf by fprintf. * scripts/miscellaneous/ls.m: replaced puts by fputs. * scripts/miscellaneous/menu.m: replaced printf by fprintf. * scripts/miscellaneous/mkoctfile.m: replaced printf by fprintf. * scripts/miscellaneous/private/display_info_file.m: * scripts/miscellaneous/unix.m: replaced printf by fprintf. * scripts/miscellaneous/ver.m: replaced printf by fprintf. * scripts/miscellaneous/what.m: replaced printf by fprintf. * scripts/ode/ode23.m: replaced printf by fprintf. * scripts/ode/ode45.m: replaced printf by fprintf. * scripts/optimization/fminbnd.m: replaced printf by fprintf. * scripts/optimization/optimset.m: replaced puts by fputs and printf by fprintf. * scripts/optimization/sqp.m: replaced printf by fprintf. * scripts/pkg/pkg.m: replaced printf by fprintf. * scripts/pkg/private/describe.m: replaced printf by fprintf. * scripts/pkg/private/install.m: replaced printf by fprintf. * scripts/pkg/private/installed_packages.m: replaced printf by fprintf. * scripts/pkg/private/list_forge_packages.m: replaced puts by fputs and printf by fprintf. * scripts/pkg/private/rebuild.m: replaced printf by fprintf. * scripts/plot/util/__gnuplot_drawnow__.m: replaced puts by fputs and printf by fprintf. * scripts/signal/stft.m: replaced printf by fprintf. * scripts/sparse/bicg.m: replaced printf by fprintf. * scripts/sparse/bicgstab.m: replaced printf by fprintf. * scripts/sparse/cgs.m: replaced printf by fprintf. * scripts/sparse/pcg.m: replaced printf by fprintf. * scripts/sparse/pcr.m: replaced printf by fprintf. * scripts/sparse/qmr.m: replaced printf by fprintf. * scripts/statistics/models/logistic_regression.m: replaced printf by fprintf. * scripts/statistics/tests/anova.m: replaced printf by fprintf. * scripts/statistics/tests/bartlett_test.m: replaced printf by fprintf. * scripts/statistics/tests/chisquare_test_homogeneity.m: replaced printf by fprintf. * scripts/statistics/tests/chisquare_test_independence.m: replaced printf by fprintf. * scripts/statistics/tests/cor_test.m: replaced printf by fprintf. * scripts/statistics/tests/f_test_regression.m: replaced printf by fprintf. * scripts/statistics/tests/hotelling_test.m: replaced printf by fprintf. * scripts/statistics/tests/hotelling_test_2.m: replaced printf by fprintf. * scripts/statistics/tests/kolmogorov_smirnov_test.m: replaced printf by fprintf. * scripts/statistics/tests/kolmogorov_smirnov_test_2.m: replaced printf by fprintf. * scripts/statistics/tests/kruskal_wallis_test.m: replaced printf by fprintf. * scripts/statistics/tests/manova.m: replaced printf by fprintf. * scripts/statistics/tests/mcnemar_test.m: replaced printf by fprintf. * scripts/statistics/tests/prop_test_2.m: replaced printf by fprintf. * scripts/statistics/tests/run_test.m: replaced printf by fprintf. * scripts/statistics/tests/sign_test.m: replaced printf by fprintf. * scripts/statistics/tests/t_test.m: replaced printf by fprintf. * scripts/statistics/tests/t_test_2.m: replaced printf by fprintf. * scripts/statistics/tests/t_test_regression.m: replaced printf by fprintf. * scripts/statistics/tests/u_test.m: replaced printf by fprintf. * scripts/statistics/tests/var_test.m: replaced printf by fprintf. * scripts/statistics/tests/welch_test.m: replaced printf by fprintf. * scripts/statistics/tests/wilcoxon_test.m: replaced printf by fprintf. * scripts/statistics/tests/z_test.m: replaced printf by fprintf. * scripts/statistics/tests/z_test_2.m: replaced printf by fprintf. * scripts/strings/strtok.m: replaced printf by fprintf. * scripts/testfun/__run_test_suite__.m: replaced puts by fputs and printf by fprintf. * scripts/testfun/demo.m: replaced printf by fprintf. * scripts/testfun/example.m: replaced printf by fprintf. * scripts/testfun/private/compare_plot_demos.m: replaced printf by fprintf. * scripts/testfun/rundemos.m: replaced printf by fprintf. * scripts/testfun/runtests.m: replaced puts by fputs and printf by fprintf. * scripts/testfun/speed.m: replaced printf by fprintf. * scripts/testfun/test.m: replaced printf by fprintf. * scripts/time/calendar.m: replaced puts by fputs and printf by fprintf. * test/io.tst: replaced printf by fprintf.
author Kai T. Ohlhus <k.ohlhus@gmail.com>
date Wed, 20 Apr 2016 17:53:10 +0200
parents 516bb87ea72e
children 96518f623c91
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
19697
4197fc428c7d maint: Update copyright notices for 2015.
John W. Eaton <jwe@octave.org>
parents: 17744
diff changeset
1 ## Copyright (C) 1995-2015 Kurt Hornik
3426
f8dde1807dee [project @ 2000-01-13 08:40:00 by jwe]
jwe
parents: 3200
diff changeset
2 ##
3922
38c61cbf086c [project @ 2002-05-01 06:48:35 by jwe]
jwe
parents: 3457
diff changeset
3 ## This file is part of Octave.
38c61cbf086c [project @ 2002-05-01 06:48:35 by jwe]
jwe
parents: 3457
diff changeset
4 ##
38c61cbf086c [project @ 2002-05-01 06:48:35 by jwe]
jwe
parents: 3457
diff changeset
5 ## Octave is free software; you can redistribute it and/or modify it
38c61cbf086c [project @ 2002-05-01 06:48:35 by jwe]
jwe
parents: 3457
diff changeset
6 ## under the terms of the GNU General Public License as published by
7016
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 6046
diff changeset
7 ## the Free Software Foundation; either version 3 of the License, or (at
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 6046
diff changeset
8 ## your option) any later version.
3426
f8dde1807dee [project @ 2000-01-13 08:40:00 by jwe]
jwe
parents: 3200
diff changeset
9 ##
3922
38c61cbf086c [project @ 2002-05-01 06:48:35 by jwe]
jwe
parents: 3457
diff changeset
10 ## Octave is distributed in the hope that it will be useful, but
3200
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
3426
f8dde1807dee [project @ 2000-01-13 08:40:00 by jwe]
jwe
parents: 3200
diff changeset
13 ## General Public License for more details.
f8dde1807dee [project @ 2000-01-13 08:40:00 by jwe]
jwe
parents: 3200
diff changeset
14 ##
3200
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
15 ## You should have received a copy of the GNU General Public License
7016
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 6046
diff changeset
16 ## along with Octave; see the file COPYING. If not, see
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 6046
diff changeset
17 ## <http://www.gnu.org/licenses/>.
3200
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
18
3454
d8b731d3f7a3 [project @ 2000-01-18 10:13:31 by jwe]
jwe
parents: 3426
diff changeset
19 ## -*- texinfo -*-
20852
516bb87ea72e 2015 Code Sprint: remove class of function from docstring for all m-files.
Rik <rik@octave.org>
parents: 20174
diff changeset
20 ## @deftypefn {} {[@var{pval}, @var{t}, @var{df}] =} t_test_2 (@var{x}, @var{y}, @var{alt})
20174
d9341b422488 doc: Update more docstrings to have one sentence summary as first line.
Rik <rik@octave.org>
parents: 19833
diff changeset
21 ## For two samples x and y from normal distributions with unknown means and
d9341b422488 doc: Update more docstrings to have one sentence summary as first line.
Rik <rik@octave.org>
parents: 19833
diff changeset
22 ## unknown equal variances, perform a two-sample t-test of the null
d9341b422488 doc: Update more docstrings to have one sentence summary as first line.
Rik <rik@octave.org>
parents: 19833
diff changeset
23 ## hypothesis of equal means.
d9341b422488 doc: Update more docstrings to have one sentence summary as first line.
Rik <rik@octave.org>
parents: 19833
diff changeset
24 ##
d9341b422488 doc: Update more docstrings to have one sentence summary as first line.
Rik <rik@octave.org>
parents: 19833
diff changeset
25 ## Under the null, the test statistic @var{t} follows a Student distribution
d9341b422488 doc: Update more docstrings to have one sentence summary as first line.
Rik <rik@octave.org>
parents: 19833
diff changeset
26 ## with @var{df} degrees of freedom.
3200
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
27 ##
20174
d9341b422488 doc: Update more docstrings to have one sentence summary as first line.
Rik <rik@octave.org>
parents: 19833
diff changeset
28 ## With the optional argument string @var{alt}, the alternative of interest
d9341b422488 doc: Update more docstrings to have one sentence summary as first line.
Rik <rik@octave.org>
parents: 19833
diff changeset
29 ## can be selected. If @var{alt} is @qcode{"!="} or @qcode{"<>"}, the null
d9341b422488 doc: Update more docstrings to have one sentence summary as first line.
Rik <rik@octave.org>
parents: 19833
diff changeset
30 ## is tested against the two-sided alternative @code{mean (@var{x}) != mean
d9341b422488 doc: Update more docstrings to have one sentence summary as first line.
Rik <rik@octave.org>
parents: 19833
diff changeset
31 ## (@var{y})}. If @var{alt} is @qcode{">"}, the one-sided alternative
d9341b422488 doc: Update more docstrings to have one sentence summary as first line.
Rik <rik@octave.org>
parents: 19833
diff changeset
32 ## @code{mean (@var{x}) > mean (@var{y})} is used. Similarly for
d9341b422488 doc: Update more docstrings to have one sentence summary as first line.
Rik <rik@octave.org>
parents: 19833
diff changeset
33 ## @qcode{"<"}, the one-sided alternative @code{mean (@var{x}) < mean
d9341b422488 doc: Update more docstrings to have one sentence summary as first line.
Rik <rik@octave.org>
parents: 19833
diff changeset
34 ## (@var{y})} is used. The default is the two-sided case.
3200
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
35 ##
3454
d8b731d3f7a3 [project @ 2000-01-18 10:13:31 by jwe]
jwe
parents: 3426
diff changeset
36 ## The p-value of the test is returned in @var{pval}.
3426
f8dde1807dee [project @ 2000-01-13 08:40:00 by jwe]
jwe
parents: 3200
diff changeset
37 ##
3200
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
38 ## If no output argument is given, the p-value of the test is displayed.
3454
d8b731d3f7a3 [project @ 2000-01-18 10:13:31 by jwe]
jwe
parents: 3426
diff changeset
39 ## @end deftypefn
3426
f8dde1807dee [project @ 2000-01-13 08:40:00 by jwe]
jwe
parents: 3200
diff changeset
40
5428
2a16423e4aa0 [project @ 2005-08-23 18:38:27 by jwe]
jwe
parents: 5307
diff changeset
41 ## Author: KH <Kurt.Hornik@wu-wien.ac.at>
3456
434790acb067 [project @ 2000-01-19 06:58:51 by jwe]
jwe
parents: 3454
diff changeset
42 ## Description: Student's two-sample t test
3200
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
43
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
44 function [pval, t, df] = t_test_2 (x, y, alt)
3426
f8dde1807dee [project @ 2000-01-13 08:40:00 by jwe]
jwe
parents: 3200
diff changeset
45
19833
9fc020886ae9 maint: Clean up m-files to follow Octave coding conventions.
Rik <rik@octave.org>
parents: 19697
diff changeset
46 if (nargin < 2 || nargin > 3)
9fc020886ae9 maint: Clean up m-files to follow Octave coding conventions.
Rik <rik@octave.org>
parents: 19697
diff changeset
47 print_usage ();
3200
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
48 endif
3426
f8dde1807dee [project @ 2000-01-13 08:40:00 by jwe]
jwe
parents: 3200
diff changeset
49
4030
22bd65326ec1 [project @ 2002-08-09 18:58:13 by jwe]
jwe
parents: 3922
diff changeset
50 if (! (isvector (x) && isvector (y)))
11472
1740012184f9 Use uppercase for variable names in error() strings to match Info documentation. Only m-files done.
Rik <octave@nomad.inbox5.com>
parents: 10606
diff changeset
51 error ("t_test_2: both X and Y must be vectors");
3200
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
52 endif
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
53
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
54 n_x = length (x);
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
55 n_y = length (y);
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
56 df = n_x + n_y - 2;
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
57 mu_x = sum (x) / n_x;
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
58 mu_y = sum (y) / n_y;
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
59 v = sumsq (x - mu_x) + sumsq (y - mu_y);
3457
e031284eea27 [project @ 2000-01-19 08:49:56 by jwe]
jwe
parents: 3456
diff changeset
60 t = (mu_x - mu_y) * sqrt ((n_x * n_y * df) / (v * (n_x + n_y)));
10606
ec34c7acd057 Replace deprecated function calls in statistics tests
Rik <octave@nomad.inbox5.com>
parents: 7017
diff changeset
61 cdf = tcdf (t, df);
3200
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
62
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
63 if (nargin == 2)
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
64 alt = "!=";
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
65 endif
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
66
5443
ec8c33dcd1bf [project @ 2005-09-08 01:40:57 by jwe]
jwe
parents: 5428
diff changeset
67 if (! ischar (alt))
11472
1740012184f9 Use uppercase for variable names in error() strings to match Info documentation. Only m-files done.
Rik <octave@nomad.inbox5.com>
parents: 10606
diff changeset
68 error ("t_test_2: ALT must be a string");
3200
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
69 endif
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
70 if (strcmp (alt, "!=") || strcmp (alt, "<>"))
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
71 pval = 2 * min (cdf, 1 - cdf);
14552
86854d032a37 maint: miscellaneous style fixes for .m files
John W. Eaton <jwe@octave.org>
parents: 14138
diff changeset
72 elseif (strcmp (alt, ">"))
3200
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
73 pval = 1 - cdf;
14552
86854d032a37 maint: miscellaneous style fixes for .m files
John W. Eaton <jwe@octave.org>
parents: 14138
diff changeset
74 elseif (strcmp (alt, "<"))
3200
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
75 pval = cdf;
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
76 else
3456
434790acb067 [project @ 2000-01-19 06:58:51 by jwe]
jwe
parents: 3454
diff changeset
77 error ("t_test_2: option %s not recognized", alt);
3200
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
78 endif
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
79
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
80 if (nargout == 0)
21633
dcf8922b724b Deprecate printf, puts, and scanf. Make fputs a M-file.
Kai T. Ohlhus <k.ohlhus@gmail.com>
parents: 20852
diff changeset
81 fprintf (" pval: %g\n", pval);
3200
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
82 endif
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
83
781c930425fd [project @ 1998-10-29 05:23:08 by jwe]
jwe
parents:
diff changeset
84 endfunction
17338
1c89599167a6 maint: End m-files with 1 blank line.
Rik <rik@octave.org>
parents: 17281
diff changeset
85