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1 # Copyright (C) 1997 Kai P. Mueller |
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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 outsys = ugain(n) |
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20 # function outsys = ugain(n) |
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21 # Creates a system with unity gain, no states. |
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22 # This trivial system is sometimes needed to create arbitrary |
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23 # complex systems from simple systems with buildssic. |
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24 # Watch out if you are forming sampled systems since "ugain" |
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25 # does not contain a sampling period. |
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26 # |
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27 # See also: hinfdemo (MIMO H_infinty example, Boeing 707-321 aircraft model) |
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28 |
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29 # Written by Kai P. Mueller April, 1998 |
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30 # Updates |
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31 |
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32 if((nargin != 1) || (nargout > 1)) |
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33 usage("outsys = ugain(n)") |
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34 endif |
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35 outsys = ss2sys([],[],[],eye(n)); |
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36 endfunction |
