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git-svn-id: http://moon:8086/svn/matlab/trunk@100 801c6759-fa7c-4059-a304-17956f83a07c
2018-12-14 17:16:15 +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} =} interpol_eval (@var{input1}, @var{input2})
+##
+## @seealso{}
+## @end deftypefn
+
+## Author: Jens Ahrensfeld <ahrensfeld@w2ess001vm>
+## Created: 2018-11-21
+
+function interpol_eval ()
+
+N = 20;
+n = (0:N-1);
+
+f = 1;
+x = cos(2*pi*f*n/N);
+
+Ts = 0.75;
+
+ii = 0;
+ns = [];
+while ii < (N-1)
+	ns = [ns ii];
+	ii = ii + Ts;
+end
+
+is = fix(ns);
+fs = ns - is;
+is = is + 1;
+
+xs = (1-fs).*x(is) + fs.*x(is+1);
+
+plot(n, x, '-*', ns, xs, 'rx'); grid;
+
+endfunction