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annotate scripts/statistics/base/run_count.m @ 3200:781c930425fd

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[project @ 1998-10-29 05:23:08 by jwe]
author jwe
date Thu, 29 Oct 1998 05:23:09 +0000
parents
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: run_count (x, n)
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18 ##
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19 ## Counts the upward runs in the columns of x of length 1, 2, ... n-1
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20 ## and >= n.
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21
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22 ## Author: FL <Friedrich.Leisch@ci.tuwien.ac.at>
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23 ## Description: Count upward runs
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24
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25 function retval = run_count (x, n)
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26
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27 [xr, xc] = size(x);
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28
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29 tmp = zeros (xr,xc);
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30 retval = zeros (n, xc);
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31
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32 for j = 1 : xc
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33 run = 1;
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34 count = 1;
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35
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36 for k = 2 : xr
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37
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38 if x(k, j) < x(k-1, j)
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39 tmp(run, j) = count;
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40 run = run + 1;
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41 count = 0;
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42 endif
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43
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44 count = count + 1;
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45
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46 endfor
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47
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48 tmp(run, j) = count;
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49
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50 endfor
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51
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52 for k=1 : (n-1)
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53 retval(k, :) = sum (tmp == k);
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54 endfor
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55 retval(n, :) = sum (tmp >= n);
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56
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57 endfunction