/usr/share/octave/packages/optim-1.4.1/dcdp.m is in octave-optim 1.4.1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | ## Copyright (C) 2010-2013 Olaf Till <i7tiol@t-online.de>
##
## This program 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 3 of the License, or (at your option) any later
## version.
##
## This program 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
## this program; if not, see <http://www.gnu.org/licenses/>.
## function prt = dcdp (f, p, dp, func[, bounds])
##
## This is an interface to __dfdp__.m, similar to dfdp.m, but for
## functions only of parameters 'p', not of independents 'x'. See
## dfdp.m.
##
## dfpdp is more general and is meant to be used instead of dcdp in
## optimization.
function prt = dcdp (f, p, dp, func, bounds)
if (ischar (func))
func = str2func (func);
endif
hook.f = f;
if (nargin > 4)
hook.lbounds = bounds(:, 1);
hook.ubounds = bounds(:, 2);
endif
hook.diffp = abs (dp);
hook.fixed = dp == 0;
hook.diff_onesided = dp < 0;
prt = __dfdp__ (p, func, hook);
endfunction
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