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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 |
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7 ## the Free Software Foundation; either version 3 of the License, or (at |
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8 ## your option) any later version. |
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9 ## |
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10 ## Octave is distributed in the hope that it will be useful, but |
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 ## General Public License 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, see |
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17 ## <http://www.gnu.org/licenses/>. |
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18 |
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19 ## -*- texinfo -*- |
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20 ## @deftypefn {Function File} {[@var{systype}, @var{nout}, @var{nin}, @var{ncstates}, @var{ndstates}] =} minfo (@var{inmat}) |
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21 ## Determines the type of system matrix. @var{inmat} can be a varying, |
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22 ## a system, a constant, and an empty matrix. |
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23 ## |
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24 ## @strong{Outputs} |
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25 ## @table @var |
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26 ## @item systype |
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27 ## Can be one of: varying, system, constant, and empty. |
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28 ## @item nout |
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29 ## The number of outputs of the system. |
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30 ## @item nin |
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31 ## The number of inputs of the system. |
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32 ## @item ncstates |
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33 ## The number of continuous states of the system. |
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34 ## @item ndstates |
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35 ## The number of discrete states of the system. |
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36 ## @end table |
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37 ## @end deftypefn |
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38 |
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39 ## Author: R. Bruce Tenison <btenison@eng.auburn.edu> |
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40 ## Created: July 29, 1994 |
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41 ## Modified by David Clem November 13, 1994 |
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42 ## Modified by A. S. Hodel July 1995 |
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43 |
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44 function [systype, nout, nin, ncstates, ndstates] = minfo (inmat) |
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45 |
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46 warning("minfo: obsolete. Use sys2ss, sys2tf, or sys2zp."); |
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47 |
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48 if (nargin ~= 1 ) |
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49 disp ("MINFO: Wrong number of arguments") |
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50 systype = nout = nin = ncstates = ndstates = []; |
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51 endif |
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52 |
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53 [rr,cc] = size(inmat); |
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54 |
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55 ## Check for empty matrix first! |
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56 if (isempty(inmat)) |
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57 systype = "empty"; |
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58 nout = nin = ncstates = ndstates = 0; |
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59 return |
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60 |
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61 ## Check for Constant matrix |
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62 |
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63 elseif (rr == 1 || cc == 1) |
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64 systype = "constant"; |
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65 nout = nin = ncstates = ndstates = 1; |
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66 return |
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67 |
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68 ## Check for system type matrix |
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69 elseif (inmat(rr,cc) == -Inf) |
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70 systype = "system"; |
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71 ncstates = inmat(1,cc); |
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72 ndstates = inmat(rr,1); |
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73 nstates = ncstates + ndstates; |
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74 nout = rr - nstates - 1; |
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75 nin = cc - nstates - 1; |
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76 |
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77 ## Check for Varying type matrix |
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78 elseif (inmat(rr,cc) == Inf) |
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79 systype = "varying"; |
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80 npoints = inmat(rr,cc-1); |
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81 nin = cc - 1; |
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82 nout = rr / npoints; |
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83 nstates = 0; |
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84 |
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85 ## Must be a standard matrix |
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86 else |
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87 systype = "constant"; |
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88 nin = cc; |
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89 nout = rr; |
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90 ncstates = 0; |
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91 ndstates = 0; |
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92 endif |
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93 endfunction |
