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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 plotfftk_db (all_data, k, sample_rate)
if (nargin == 2)
sample_rate = 1.0;
endif;
if ((m = nargchk (2,3,nargin)))
usage (m);
endif;
len = 1024;
data = all_data(k*len + 1 : (k+1)*len);
## s = fft (data.*kaiser(len, 5));
## s = fft (data.*hamming(len));
s = fft (data.*hanning(len));
incr = sample_rate/len;
min_x = -sample_rate/2;
max_x = sample_rate/2 - incr;
plot (min_x:incr:max_x, 20 * log10(abs(fftshift(s))));
endfunction
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