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1 # Copyright (C) 1993 John W. Eaton |
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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, 675 Mass Ave, Cambridge, MA 02139, USA. |
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18 |
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26
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19 function retval = is_observable (a,c,tol) |
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20 |
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21 # usage: is_observable (a, c {,tol}) |
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22 # |
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23 # Returns 1 if the pair (a, c) is observable, or 0 if not. |
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24 # |
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25 # See also: size, rows, columns, length, is_matrix, is_scalar, is_vector. |
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26 |
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27 # Written by A. S. Hodel (scotte@eng.auburn.edu) August 1993. |
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28 |
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26
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29 if (nargin == 2) |
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30 retval = is_controllable (a', c'); |
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31 elseif (nargin == 3) |
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32 retval = is_controllable (a', c', tol); |
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33 else |
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34 error ("usage: is_observable (a, c {,tol})"); |
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35 endif |
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36 |
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37 endfunction |
