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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 <arichard@stark.cc.oh.us>
## 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
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