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annotate scripts/control/system/sysidx.m @ 3430:65b3519ac3a1

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[project @ 2000-01-14 03:44:03 by jwe]
author jwe
date Fri, 14 Jan 2000 03:50:02 +0000
parents
children a892190f4977
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1 ## Copyright (C) 1996, 1998 Auburn University. All rights reserved.
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2 ##
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3 ## This file is part of Octave.
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4 ##
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5 ## Octave is free software; you can redistribute it and/or modify it
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6 ## under the terms of the GNU General Public License as published by the
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7 ## Free Software Foundation; either version 2, or (at your option) any
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8 ## later version.
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9 ##
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10 ## Octave is distributed in the hope that it will be useful, but WITHOUT
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11 ## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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12 ## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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13 ## for more details.
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14 ##
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15 ## You should have received a copy of the GNU General Public License
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16 ## along with Octave; see the file COPYING. If not, write to the Free
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17 ## Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA.
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18
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19 ## idxvec = sysidx (sys, sigtype, signamelist)
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20 ## return indices of signals with specified signal names
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21 ## inputs:
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22 ## sys: OCST system data structure
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23 ## sigtype: signal type to be selected: "in", "out", "st"
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24 ## signamelist: list of desired signal names
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25 ## outputs:
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26 ## idxvec: vector of signal indices (appropriate for use with sysprune)
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27
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28 function idxvec = sysidx (sys, sigtype, signamelist)
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29
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30 if (nargin != 3)
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31 usage ("idxvec = sysidx (sys, sigtype, signamelist)");
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32 elseif (! is_struct (sys))
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33 error ("sys must be a system data structure");
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34 elseif (! isstr (sigtype))
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35 error ("sigtype must be a string");
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36 elseif (rows (sigtype) != 1)
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37 [nr, nc] = size (sigtype);
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38 error ("sigtype (%d x %d) must be a single string", nr, nc);
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39 endif
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40
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41 ## extract correct set of signal names values
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42 [idxvec, msg] = listidx (list ("in", "out", "st", "yd"), sigtype);
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43 if (msg)
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44 error ("invalid sigtype = %s", sigtype);
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45 endif
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46
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47 syssiglist = sysgetsignals (sys, sigtype);
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48 [idxvec, msg] = listidx (syssiglist, signamelist);
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49 if (length (msg))
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50 error ("sysidx (sigtype = %s): %s", sigtype,
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51 strrep (msg, "strlist", "signamelist"));
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52 endif
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53
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54 endfunction