Mercurial > octave-nkf
annotate scripts/statistics/tests/t_test.m @ 17338:1c89599167a6
maint: End m-files with 1 blank line.
Simplifies automated grammarchecking script.
* scripts/@ftp/ascii.m, scripts/@ftp/binary.m, scripts/@ftp/cd.m,
scripts/@ftp/close.m, scripts/@ftp/delete.m, scripts/@ftp/dir.m,
scripts/@ftp/display.m, scripts/@ftp/ftp.m, scripts/@ftp/loadobj.m,
scripts/@ftp/mget.m, scripts/@ftp/mkdir.m, scripts/@ftp/mput.m,
scripts/@ftp/rename.m, scripts/@ftp/rmdir.m, scripts/@ftp/saveobj.m,
scripts/audio/lin2mu.m, scripts/audio/loadaudio.m, scripts/audio/mu2lin.m,
scripts/audio/record.m, scripts/audio/saveaudio.m, scripts/audio/setaudio.m,
scripts/deprecated/__error_text__.m, scripts/deprecated/cut.m,
scripts/deprecated/error_text.m, scripts/deprecated/isstr.m,
scripts/deprecated/polyderiv.m, scripts/deprecated/studentize.m,
scripts/deprecated/sylvester_matrix.m, scripts/general/bicubic.m,
scripts/general/celldisp.m, scripts/general/colon.m,
scripts/general/cplxpair.m, scripts/general/del2.m, scripts/general/display.m,
scripts/general/isdir.m, scripts/general/isequaln.m, scripts/general/loadobj.m,
scripts/general/private/__isequal__.m, scripts/general/private/__splinen__.m,
scripts/general/profexplore.m, scripts/general/quadgk.m,
scripts/general/randi.m, scripts/general/repmat.m, scripts/general/saveobj.m,
scripts/geometry/delaunay.m, scripts/help/__unimplemented__.m,
scripts/help/doc_cache_create.m, scripts/help/get_first_help_sentence.m,
scripts/help/help.m, scripts/help/print_usage.m,
scripts/help/private/__additional_help_message__.m,
scripts/help/private/__strip_html_tags__.m, scripts/help/type.m,
scripts/image/imfinfo.m, scripts/image/imformats.m, scripts/image/imread.m,
scripts/image/imwrite.m, scripts/image/private/__imfinfo__.m,
scripts/image/private/__imread__.m, scripts/image/private/__imwrite__.m,
scripts/image/private/imageIO.m, scripts/image/private/imwrite_filename.m,
scripts/image/private/ind2x.m, scripts/io/beep.m, scripts/io/strread.m,
scripts/io/textread.m, scripts/io/textscan.m, scripts/linear-algebra/krylov.m,
scripts/linear-algebra/subspace.m, scripts/miscellaneous/bug_report.m,
scripts/miscellaneous/bunzip2.m, scripts/miscellaneous/cast.m,
scripts/miscellaneous/copyfile.m, scripts/miscellaneous/debug.m,
scripts/miscellaneous/dir.m, scripts/miscellaneous/dump_prefs.m,
scripts/miscellaneous/error_ids.m, scripts/miscellaneous/fileattrib.m,
scripts/miscellaneous/gunzip.m, scripts/miscellaneous/isdeployed.m,
scripts/miscellaneous/ismac.m, scripts/miscellaneous/mex.m,
scripts/miscellaneous/mexext.m, scripts/miscellaneous/mkoctfile.m,
scripts/miscellaneous/movefile.m, scripts/miscellaneous/namelengthmax.m,
scripts/miscellaneous/news.m, scripts/miscellaneous/pack.m,
scripts/miscellaneous/perl.m,
scripts/miscellaneous/private/display_info_file.m,
scripts/miscellaneous/python.m, scripts/miscellaneous/rmappdata.m,
scripts/miscellaneous/run.m, scripts/miscellaneous/tar.m,
scripts/miscellaneous/tempname.m, scripts/miscellaneous/untar.m,
scripts/miscellaneous/unzip.m, scripts/miscellaneous/what.m,
scripts/miscellaneous/zip.m, scripts/optimization/fminunc.m,
scripts/optimization/fsolve.m, scripts/optimization/fzero.m,
scripts/optimization/glpk.m, scripts/optimization/optimget.m,
scripts/optimization/optimset.m, scripts/optimization/qp.m,
scripts/optimization/sqp.m, scripts/path/pathdef.m, scripts/pkg/pkg.m,
scripts/pkg/private/build.m, scripts/pkg/private/describe.m,
scripts/pkg/private/dirempty.m, scripts/pkg/private/get_forge_download.m,
scripts/pkg/private/get_forge_pkg.m,
scripts/pkg/private/get_unsatisfied_deps.m, scripts/pkg/private/install.m,
scripts/pkg/private/is_architecture_dependent.m,
scripts/pkg/private/list_forge_packages.m, scripts/pkg/private/rebuild.m,
scripts/pkg/private/shell.m, scripts/pkg/private/uninstall.m,
scripts/plot/axes.m, scripts/plot/box.m, scripts/plot/closereq.m,
scripts/plot/diffuse.m, scripts/plot/ezpolar.m, scripts/plot/findfigs.m,
scripts/plot/gco.m, scripts/plot/guidata.m, scripts/plot/guihandles.m,
scripts/plot/hdl2struct.m, scripts/plot/linkprop.m, scripts/plot/peaks.m,
scripts/plot/print.m, scripts/plot/private/__add_datasource__.m,
scripts/plot/private/__axis_label__.m, scripts/plot/private/__clabel__.m,
scripts/plot/private/__color_str_rgb__.m, scripts/plot/private/__contour__.m,
scripts/plot/private/__default_plot_options__.m,
scripts/plot/private/__errcomm__.m, scripts/plot/private/__file_filter__.m,
scripts/plot/private/__fltk_file_filter__.m,
scripts/plot/private/__getlegenddata__.m,
scripts/plot/private/__gnuplot_open_stream__.m,
scripts/plot/private/__gnuplot_print__.m,
scripts/plot/private/__go_draw_axes__.m,
scripts/plot/private/__interp_cube__.m, scripts/plot/private/__is_function__.m,
scripts/plot/private/__line__.m, scripts/plot/private/__marching_cube__.m,
scripts/plot/private/__next_line_style__.m, scripts/plot/private/__patch__.m,
scripts/plot/private/__pie__.m, scripts/plot/private/__pltopt__.m,
scripts/plot/private/__quiver__.m, scripts/plot/private/__scatter__.m,
scripts/plot/private/__stem__.m, scripts/plot/private/__uigetdir_fltk__.m,
scripts/plot/private/__uigetfile_fltk__.m,
scripts/plot/private/__uiobject_split_args__.m,
scripts/plot/private/__uiputfile_fltk__.m, scripts/plot/refresh.m,
scripts/plot/saveas.m, scripts/plot/shg.m, scripts/plot/specular.m,
scripts/plot/sphere.m, scripts/plot/struct2hdl.m, scripts/plot/subplot.m,
scripts/plot/uicontextmenu.m, scripts/plot/uicontrol.m, scripts/plot/uipanel.m,
scripts/plot/uipushtool.m, scripts/plot/uiresume.m,
scripts/plot/uitoggletool.m, scripts/plot/uitoolbar.m, scripts/plot/uiwait.m,
scripts/plot/waitforbuttonpress.m, scripts/polynomial/pchip.m,
scripts/polynomial/polyeig.m, scripts/polynomial/ppval.m,
scripts/prefs/addpref.m, scripts/prefs/getpref.m, scripts/prefs/ispref.m,
scripts/prefs/private/loadprefs.m, scripts/prefs/private/prefsfile.m,
scripts/prefs/private/saveprefs.m, scripts/prefs/setpref.m,
scripts/set/private/validargs.m, scripts/set/unique.m,
scripts/signal/arch_fit.m, scripts/signal/arch_rnd.m,
scripts/signal/arch_test.m, scripts/signal/arma_rnd.m,
scripts/signal/durbinlevinson.m, scripts/signal/fractdiff.m,
scripts/signal/freqz.m, scripts/signal/freqz_plot.m, scripts/signal/hurst.m,
scripts/signal/periodogram.m, scripts/signal/private/rectangle_lw.m,
scripts/signal/private/rectangle_sw.m, scripts/signal/private/triangle_sw.m,
scripts/signal/spectral_adf.m, scripts/signal/spectral_xdf.m,
scripts/signal/stft.m, scripts/signal/synthesis.m, scripts/signal/yulewalker.m,
scripts/sparse/colperm.m, scripts/sparse/eigs.m, scripts/sparse/etreeplot.m,
scripts/sparse/gmres.m, scripts/sparse/private/__sprand_impl__.m,
scripts/sparse/spdiags.m, scripts/sparse/sprandn.m, scripts/specfun/bessel.m,
scripts/specfun/betaln.m, scripts/specfun/expint.m,
scripts/special-matrix/gallery.m, scripts/startup/__finish__.m,
scripts/statistics/base/qqplot.m, scripts/statistics/distributions/tcdf.m,
scripts/statistics/distributions/wienrnd.m,
scripts/statistics/models/logistic_regression.m,
scripts/statistics/models/private/logistic_regression_derivatives.m,
scripts/statistics/models/private/logistic_regression_likelihood.m,
scripts/statistics/tests/anova.m, scripts/statistics/tests/bartlett_test.m,
scripts/statistics/tests/chisquare_test_homogeneity.m,
scripts/statistics/tests/chisquare_test_independence.m,
scripts/statistics/tests/cor_test.m,
scripts/statistics/tests/f_test_regression.m,
scripts/statistics/tests/hotelling_test.m,
scripts/statistics/tests/hotelling_test_2.m,
scripts/statistics/tests/kolmogorov_smirnov_test_2.m,
scripts/statistics/tests/kruskal_wallis_test.m,
scripts/statistics/tests/manova.m, scripts/statistics/tests/mcnemar_test.m,
scripts/statistics/tests/prop_test_2.m, scripts/statistics/tests/run_test.m,
scripts/statistics/tests/sign_test.m, scripts/statistics/tests/t_test.m,
scripts/statistics/tests/t_test_2.m,
scripts/statistics/tests/t_test_regression.m,
scripts/statistics/tests/u_test.m, scripts/statistics/tests/var_test.m,
scripts/statistics/tests/welch_test.m,
scripts/statistics/tests/wilcoxon_test.m, scripts/statistics/tests/z_test.m,
scripts/statistics/tests/z_test_2.m, scripts/strings/strcat.m,
scripts/strings/strjoin.m, scripts/strings/strsplit.m,
scripts/testfun/__have_feature__.m, scripts/testfun/__printf_assert__.m,
scripts/testfun/__prog_output_assert__.m, scripts/testfun/__run_test_suite__.m,
scripts/time/clock.m, scripts/time/datenum.m, scripts/ui/errordlg.m,
scripts/ui/private/message_dialog.m: End m-files with 1 blank line.
| author | Rik <rik@octave.org> |
|---|---|
| date | Wed, 28 Aug 2013 08:33:02 -0700 |
| parents | bc924baa2c4e |
| children | d63878346099 |
| rev | line source |
|---|---|
|
14138
72c96de7a403
maint: update copyright notices for 2012
John W. Eaton <jwe@octave.org>
parents:
11523
diff
changeset
|
1 ## Copyright (C) 1995-2012 Kurt Hornik |
| 3426 | 2 ## |
| 3922 | 3 ## This file is part of Octave. |
| 4 ## | |
| 5 ## Octave is free software; you can redistribute it and/or modify it | |
| 6 ## under the terms of the GNU General Public License as published by | |
| 7016 | 7 ## the Free Software Foundation; either version 3 of the License, or (at |
| 8 ## your option) any later version. | |
| 3426 | 9 ## |
| 3922 | 10 ## Octave is distributed in the hope that it will be useful, but |
| 3200 | 11 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 3426 | 13 ## General Public License for more details. |
| 14 ## | |
| 3200 | 15 ## You should have received a copy of the GNU General Public License |
| 7016 | 16 ## along with Octave; see the file COPYING. If not, see |
| 17 ## <http://www.gnu.org/licenses/>. | |
| 3200 | 18 |
| 3454 | 19 ## -*- texinfo -*- |
| 20 ## @deftypefn {Function File} {[@var{pval}, @var{t}, @var{df}] =} t_test (@var{x}, @var{m}, @var{alt}) | |
| 21 ## For a sample @var{x} from a normal distribution with unknown mean and | |
| 22 ## variance, perform a t-test of the null hypothesis @code{mean | |
| 23 ## (@var{x}) == @var{m}}. Under the null, the test statistic @var{t} | |
| 24 ## follows a Student distribution with @code{@var{df} = length (@var{x}) | |
| 25 ## - 1} degrees of freedom. | |
| 3200 | 26 ## |
| 3454 | 27 ## With the optional argument string @var{alt}, the alternative of |
|
17281
bc924baa2c4e
doc: Add new @qcode macro for code samples which are quoted.
Rik <rik@octave.org>
parents:
14552
diff
changeset
|
28 ## interest can be selected. If @var{alt} is @qcode{"!="} or |
|
bc924baa2c4e
doc: Add new @qcode macro for code samples which are quoted.
Rik <rik@octave.org>
parents:
14552
diff
changeset
|
29 ## @qcode{"<>"}, the null is tested against the two-sided alternative |
|
bc924baa2c4e
doc: Add new @qcode macro for code samples which are quoted.
Rik <rik@octave.org>
parents:
14552
diff
changeset
|
30 ## @code{mean (@var{x}) != @var{m}}. If @var{alt} is @qcode{">"}, the |
| 3457 | 31 ## one-sided alternative @code{mean (@var{x}) > @var{m}} is considered. |
| 32 ## Similarly for @var{"<"}, the one-sided alternative @code{mean | |
| 7001 | 33 ## (@var{x}) < @var{m}} is considered. The default is the two-sided |
| 3457 | 34 ## case. |
| 3200 | 35 ## |
| 3454 | 36 ## The p-value of the test is returned in @var{pval}. |
| 3426 | 37 ## |
| 3200 | 38 ## If no output argument is given, the p-value of the test is displayed. |
| 3454 | 39 ## @end deftypefn |
| 3426 | 40 |
| 5428 | 41 ## Author: KH <Kurt.Hornik@wu-wien.ac.at> |
| 3456 | 42 ## Description: Student's one-sample t test |
| 3200 | 43 |
| 44 function [pval, t, df] = t_test (x, m, alt) | |
| 3426 | 45 |
| 3200 | 46 if ((nargin < 2) || (nargin > 3)) |
| 6046 | 47 print_usage (); |
| 3200 | 48 endif |
| 3426 | 49 |
| 4030 | 50 if (! isvector (x)) |
|
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: X must be a vector"); |
| 3200 | 52 endif |
| 4030 | 53 if (! isscalar (m)) |
|
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
|
54 error ("t_test: M must be a scalar"); |
| 3200 | 55 endif |
| 3426 | 56 |
| 3200 | 57 n = length (x); |
| 58 df = n - 1; | |
| 59 t = sqrt (n) * (sum (x) / n - m) / std (x); | |
|
10606
ec34c7acd057
Replace deprecated function calls in statistics tests
Rik <octave@nomad.inbox5.com>
parents:
7017
diff
changeset
|
60 cdf = tcdf (t, df); |
| 3426 | 61 |
| 3200 | 62 if (nargin == 2) |
| 63 alt = "!="; | |
| 64 endif | |
| 65 | |
| 5443 | 66 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
|
67 error ("t_test: ALT must be a string"); |
| 3200 | 68 endif |
| 69 if (strcmp (alt, "!=") || strcmp (alt, "<>")) | |
| 70 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
|
71 elseif (strcmp (alt, ">")) |
| 3200 | 72 pval = 1 - cdf; |
|
14552
86854d032a37
maint: miscellaneous style fixes for .m files
John W. Eaton <jwe@octave.org>
parents:
14138
diff
changeset
|
73 elseif (strcmp (alt, "<")) |
| 3200 | 74 pval = cdf; |
| 75 else | |
| 3456 | 76 error ("t_test: option %s not recognized", alt); |
| 3200 | 77 endif |
| 78 | |
| 79 if (nargout == 0) | |
| 3456 | 80 printf (" pval: %g\n", pval); |
| 3200 | 81 endif |
| 3426 | 82 |
| 3200 | 83 endfunction |
|
17338
1c89599167a6
maint: End m-files with 1 blank line.
Rik <rik@octave.org>
parents:
17281
diff
changeset
|
84 |