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1 # Copyright (C) 1996 A. Scottedward Hodel |
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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 USEW = freqchkw(w) |
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20 # function USEW = freqchkw(w) |
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21 # used by freqresp to check that input frequency vector is legal |
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22 |
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23 # A S Hodel July 1996 |
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24 # $Revision: 2.0.0.2 $ |
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25 |
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26 if(isempty(w)) |
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27 USEW = 0; |
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28 elseif(!is_vector(w)) |
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29 error(["w (",num2str(rows(w)),"x",num2str(columns(w)), ... |
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30 "): must be [], a vector or a scalar"]); |
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31 elseif( (max(abs(imag(w))) != 0) && (min(real(w)) <= 0) ) |
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32 error("w must have real positive entries"); |
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33 else |
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34 w = sort(w); |
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35 USEW = 1; # vector provided (check values later) |
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36 endif |
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37 endfunction |
