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1 ## Copyright (C) 1996 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 ## function [systype, nout, nin, ncstates, ndstates] = minfo(inmat) |
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20 ## |
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21 ## MINFO: Determines the type of system matrix. INMAT can be |
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22 ## a varying(*), system, constant, and empty matrix. |
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23 ## |
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24 ## Returns: |
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25 ## systype can be one of: |
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26 ## varying, system, constant, and empty |
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27 ## nout is the number of outputs of the system |
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28 ## nin is the number of inputs of the system |
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29 ## ncstates is the number of continuous states of the system |
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30 ## ndstates is the number of discrete states of the system |
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31 |
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32 ## Author: R. Bruce Tenison <btenison@eng.auburn.edu> |
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33 ## Created: July 29, 1994 |
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34 ## Modified by David Clem November 13, 1994 |
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35 ## Modified by A. S. Hodel July 1995 |
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36 |
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37 function [systype, nout, nin, ncstates, ndstates] = minfo (inmat) |
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38 |
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39 warning("minfo: obsolete. Use sys2ss, sys2tf, or sys2zp."); |
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40 |
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41 if (nargin ~= 1 ) |
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42 disp ("MINFO: Wrong number of arguments") |
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43 systype = nout = nin = ncstates = ndstates = []; |
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44 endif |
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45 |
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46 [rr,cc] = size(inmat); |
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47 |
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48 ## Check for empty matrix first! |
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49 if (isempty(inmat)) |
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50 systype = "empty"; |
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51 nout = nin = ncstates = ndstates = 0; |
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52 return |
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53 |
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54 ## Check for Constant matrix |
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55 |
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56 elseif (rr == 1 || cc == 1) |
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57 systype = "constant"; |
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58 nout = nin = ncstates = ndstates = 1; |
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59 return |
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60 |
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61 ## Check for system type matrix |
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62 elseif (inmat(rr,cc) == -Inf) |
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63 systype = "system"; |
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64 ncstates = inmat(1,cc); |
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65 ndstates = inmat(rr,1); |
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66 nstates = ncstates + ndstates; |
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67 nout = rr - nstates - 1; |
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68 nin = cc - nstates - 1; |
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69 |
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70 ## Check for Varying type matrix |
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71 elseif (inmat(rr,cc) == Inf) |
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72 systype = "varying"; |
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73 npoints = inmat(rr,cc-1); |
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74 nin = cc - 1; |
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75 nout = rr / npoints; |
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76 nstates = 0; |
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77 |
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78 ## Must be a standard matrix |
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79 else |
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80 systype = "constant"; |
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81 nin = cc; |
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82 nout = rr; |
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83 ncstates = 0; |
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84 ndstates = 0; |
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85 endif |
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86 endfunction |
