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polyinteg.m
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1996-09-28
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# Copyright (C) 1995 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, 675 Mass Ave, Cambridge, MA 02139, USA.
function p = polyinteg (p)
# 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
# Written by Tony Richardson (amr@mpl.ucsd.edu) June 1994.
if(nargin != 1)
usage ("polyinteg (vector)");
endif
if (is_matrix (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