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#
# Copyright 2001 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# GNU Radio 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, or (at your option)
# any later version.
#
# GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
# the Free Software Foundation, Inc., 51 Franklin Street,
# Boston, MA 02110-1301, USA.
#
function plot_freq_response (b,...)
if (nargin == 1)
## Response of an FIR filter
a = 1;
elseif (nargin == 2)
## response of an IIR filter
a = va_arg ();
endif
[H,w] = freqz (b,a);
plot (w/(2*pi), abs(H));
grid;
xlabel ('Normalized Frequency (Fs == 1)');
ylabel ('Magnitude (linear)');
endfunction
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