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- ## Copyright (C) 1996 John W. Eaton
- ##
- ## This file is part of Octave.
- ##
- ## Octave is free software; you can redistribute it and/or modify it
- ## under the terms of the GNU General Public License as published by
- ## the Free Software Foundation; either version 2, or (at your option)
- ## any later version.
- ##
- ## Octave is distributed in the hope that it will be useful, but
- ## WITHOUT ANY WARRANTY; without even the implied warranty of
- ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- ## General Public License for more details.
- ##
- ## You should have received a copy of the GNU General Public License
- ## along with Octave; see the file COPYING. If not, write to the Free
- ## Software Foundation, 59 Temple Place - Suite 330, Boston, MA
- ## 02111-1307, USA.
-
- ## usage: polyinteg (p)
- ##
- ## Returns the coefficients of the integral the polynomial whose coefficients
- ## are represented by the vector p.
- ##
- ## The constant of integration is zero.
- ##
- ## SEE ALSO: poly, polyderiv, polyreduce, roots, conv, deconv, residue,
- ## filter, polyval, polyvalm
-
- ## Author: Tony Richardson <amr@mpl.ucsd.edu>
- ## Created: June 1994
- ## Adapted-By: jwe
-
- function p = polyinteg (p)
-
- if(nargin != 1)
- usage ("polyinteg (vector)");
- endif
-
- if (! (is_vector (p) || isempty (p)))
- error ("argument must be a vector");
- endif
-
- lp = length (p);
-
- if (lp == 0)
- p = [];
- return;
- end
-
- if (rows (p) > 1)
- ## Convert to column vector
- p = p.';
- endif
-
- p = [ p, 0 ] ./ [ lp:-1:1, 1 ];
-
- endfunction
-