1 ## Copyright (C) 2007 Michel D. Schmid <michaelschmid@users.sourceforge.net>
4 ## This program is free software; you can redistribute it and/or modify it
5 ## under the terms of the GNU General Public License as published by
6 ## the Free Software Foundation; either version 2, or (at your option)
9 ## This program is distributed in the hope that it will be useful, but
10 ## WITHOUT ANY WARRANTY; without even the implied warranty of
11 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 ## General Public License for more details.
14 ## You should have received a copy of the GNU General Public License
15 ## along with this program; see the file COPYING. If not, write to the Free
16 ## Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
20 ## @deftypefn {Function File} {}[@var{a} = dsatlin (@var{n})
24 ## @seealso{dpurelin,dtansig,dlogsig}
26 ## Author: Michel D. Schmid
29 function a = dsatlin(n)
32 # the derivative of satlin is easy:
33 # where satlin is constant, the derivative is 0
34 # else, because without variable n, the derivative is 1