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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 |
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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} {} ugain (@var{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 @command{buildssic}. |
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24 ## Watch out if you are forming sampled systems since @command{ugain} |
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25 ## does not contain a sampling period. |
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26 ## @seealso{hinfdemo, jet707} |
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27 ## @end deftypefn |
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28 |
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29 ## Author: Kai P. Mueller <mueller@ifr.ing.tu-bs.de> |
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30 ## Created: April 1998 |
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31 |
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32 function outsys = ugain (n) |
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33 |
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34 if (nargin != 1 || nargout > 1) |
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35 print_usage (); |
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36 endif |
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37 outsys = ss ([], [], [], eye (n)); |
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38 |
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39 endfunction |
