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1 # Copyright (C) 1998 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, 675 Mass Ave, Cambridge, MA 02139, USA. |
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18 |
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19 function systype = sysgettype(sys) |
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20 # systype = sysgetype(sys) |
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21 # return the initial system type of the system |
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22 # inputs: |
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23 # sys: system data structure |
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24 # outputs: |
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25 # systype: string indicating how the structure was initially |
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26 # constructed: |
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27 # values: "ss", "zp", or "tf" |
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28 |
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29 if(!is_struct(sys)) |
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30 error("sysgettype: input sys is not a structure"); |
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31 endif |
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32 |
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33 typestr = list("tf","zp","ss"); |
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34 systype = nth(typestr,sys.sys(1) + 1); |
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35 endfunction |
