- added

git-svn-id: http://moon:8086/svn/projects/HendiControl@26 fda53097-d464-4ada-af97-ba876c37ca34
2019-02-27 17:18:31 +00:00
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+## Copyright (C) 2018 Jens Ahrensfeld
+## 
+## 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/>.
+
+## -*- texinfo -*- 
+## @deftypefn {Function File} {@var{retval} =} vanDusen_eval (@var{input1}, @var{input2})
+##
+## @seealso{}
+## @end deftypefn
+
+## Author: Jens Ahrensfeld <ahrensfeld@w2ess001vm>
+## Created: 2018-05-28
+
+function [R, T] = vanDusen (R0, Tmin, Tmax, dT)
+
+a = +3.90830e-03;
+b = -5.77500e-07;
+c = -4.18301e-12;
+
+T = Tmin:dT:Tmax;
+
+Rp0 = R0*(1 + a*T + b*T.^2);
+Rm0 = Rp0 + R0*c*(T - 100).*T.^3;
+
+for i=1:length(T)
+	if (T(i) < 0)
+		R(i) = Rm0(i);
+	else
+		R(i) = Rp0(i);
+	endif
+end
+
+endfunction