Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / optim-1.2.0 / dcdp.m

diff --git a/octave_packages/optim-1.2.0/dcdp.m b/octave_packages/optim-1.2.0/dcdp.m
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+%% Copyright (C) 2010, 2011 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);
+  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);