1 ## Copyright (C) 2003 Julius O. Smith III <jos@ccrma.stanford.edu>
3 ## This program is free software; you can redistribute it and/or modify it under
4 ## the terms of the GNU General Public License as published by the Free Software
5 ## Foundation; either version 3 of the License, or (at your option) any later
8 ## This program is distributed in the hope that it will be useful, but WITHOUT
9 ## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 ## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
13 ## You should have received a copy of the GNU General Public License along with
14 ## this program; if not, see <http://www.gnu.org/licenses/>.
17 ## @deftypefn {Function File} freqs_plot (@var{w}, @var{h})
18 ## Plot the amplitude and phase of the vector @var{h}.
22 function freqs_plot(w,h)
24 mag = 20*log10(abs(h));
25 phase = unwrap(arg(h));
29 plot(w, mag, ";Magnitude (dB);");
30 title('Frequency response plot by freqs');
35 if (maxmag - min(mag) > 100) % make 100 a parameter?
36 axis([w(1), w(n), maxmag-100, maxmag]);
42 plot(w, phase/(2*pi), ";Phase (radians/2pi);");
47 xlabel("Frequency (rad/sec)");