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annotate scripts/polynomial/polyinteg.m @ 4030:22bd65326ec1

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[project @ 2002-08-09 18:58:13 by jwe]
author jwe
date Fri, 09 Aug 2002 19:00:16 +0000
parents e031284eea27
children c08cb1098afc
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1 ## Copyright (C) 1996, 1997 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
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7 ## the Free Software Foundation; either version 2, or (at your option)
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8 ## 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, write to the Free
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17 ## Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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18 ## 02111-1307, USA.
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20 ## -*- texinfo -*-
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21 ## @deftypefn {Function File} {} polyinteg (@var{c})
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22 ## Return the coefficients of the integral of the polynomial whose
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23 ## coefficients are represented by the vector @var{c}.
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24 ##
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25 ## The constant of integration is set to zero.
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26 ## @end deftypefn
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27 ## @seealso{poly, polyderiv, polyreduce, roots, conv, deconv, residue,
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28 ## filter, polyval, and polyvalm}
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30 ## Author: Tony Richardson <arichard@stark.cc.oh.us>
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31 ## Created: June 1994
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32 ## Adapted-By: jwe
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34 function p = polyinteg (p)
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36 if(nargin != 1)
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37 usage ("polyinteg (vector)");
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38 endif
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39
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40 if (! (isvector (p) || isempty (p)))
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41 error ("argument must be a vector");
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42 endif
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44 lp = length (p);
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46 if (lp == 0)
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47 p = [];
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48 return;
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49 end
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51 if (rows (p) > 1)
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52 ## Convert to column vector
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53 p = p.';
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54 endif
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56 p = [ p, 0 ] ./ [ lp:-1:1, 1 ];
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58 endfunction