/usr/share/octave/packages/3.2/optim-1.0.17/dcdp.m is in octave-optim 1.0.17-1.
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 | %% Copyright (C) 2010, 2011 Olaf Till <olaf.till@uni-jena.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 2 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)
%% 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.
if (ischar (func))
func = str2func (func);
end
hook.f = f;
if (nargin > 4)
hook.lbounds = bounds(:, 1);
hook.ubounds = bounds(:, 2);
end
hook.diffp = abs (dp);
hook.fixed = dp == 0;
hook.diff_onesided = dp < 0;
prt = __dfdp__ (p, func, hook);
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