1 ## Copyright (C) 1995-2012 Friedrich Leisch
3 ## This file is part of Octave.
5 ## Octave is free software; you can redistribute it and/or modify it
6 ## under the terms of the GNU General Public License as published by
7 ## the Free Software Foundation; either version 3 of the License, or (at
8 ## your option) any later version.
10 ## Octave is distributed in the hope that it will be useful, but
11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 ## General Public License for more details.
15 ## You should have received a copy of the GNU General Public License
16 ## along with Octave; see the file COPYING. If not, see
17 ## <http://www.gnu.org/licenses/>.
20 ## @deftypefn {Function File} {} triangle_lw (@var{n}, @var{b})
21 ## Triangular lag window. Subfunction used for spectral density
25 ## Author: FL <Friedrich.Leisch@ci.tuwien.ac.at>
26 ## Description: Triangular lag window
28 function retval = triangle_lw (n, b)
34 retval = 1 - (0 : n-1)' * b;
35 retval = max ([retval'; (zeros (1, n))])';