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annotate scripts/statistics/tests/run_test.m @ 3238:041ea33fbbf4

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[project @ 1999-03-26 17:48:16 by jwe]
author jwe
date Fri, 26 Mar 1999 17:48:35 +0000
parents 781c930425fd
children f8dde1807dee
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1 ## Copyright (C) 1995, 1996, 1997 Friedrich Leisch
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2 ##
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3 ## This program is free software; you can redistribute it and/or modify
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4 ## it under the terms of the GNU General Public License as published by
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5 ## the Free Software Foundation; either version 2, or (at your option)
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6 ## any later version.
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7 ##
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8 ## This program is distributed in the hope that it will be useful, but
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9 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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10 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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11 ## General Public License for more details.
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12 ##
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13 ## You should have received a copy of the GNU General Public License
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14 ## along with this file. If not, write to the Free Software Foundation,
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15 ## 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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16
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17 ## usage: [pval, chisq] = run_test (x)
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18 ##
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19 ## Performs a chi-square test with 6 degrees of freedom based on the
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20 ## upward runs in the columns of x. Can be used to test whether x
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21 ## contains independent data.
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22 ##
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23 ## If no output argument is given, the pval is displayed.
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25 ## Author: FL <Friedrich.Leisch@ci.tuwien.ac.at>
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26 ## Description: Run test for independence
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27
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28 function [pval, chisq] = run_test (x)
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29
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30 if (nargin != 1)
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31 usage ("run_test (x)");
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32 endif
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33
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34 A = [4529.4, 9044.9, 13568, 18091, 22615, 27892;
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35 9044.4, 18097, 27139, 36187, 45234, 55789;
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36 13568, 27139, 40721, 54281, 67852, 83685;
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37 18091, 36187, 54281, 72414, 90470, 111580;
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38 22615, 45234, 67852, 90470, 113262, 139476;
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39 27892, 55789, 83685, 111580, 139476, 172860];
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40
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41 b = [1/6; 5/24; 11/120; 19/720; 29/5040; 1/840];
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42
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43 n = rows (x);
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44 r = run_count (x, 6) - n * b * ones (1, columns(x));
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45
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46 chisq = diag (r' * A * r)' / n;
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47 pval = chisquare_cdf (chisq, 6);
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48
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49 if (nargout == 0)
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50 printf("pval: %g\n", pval);
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51 endif
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52
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53 endfunction