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| author | Manoj Gudi | 2013-10-07 20:19:55 +0530 |
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| committer | Manoj Gudi | 2013-10-07 20:20:35 +0530 |
| commit | 1826d0763c8595997f5f4af1fdb0354e9c0998ad (patch) | |
| tree | acbd852cd5a1bf17241b1038b5e37a0e72e64612 /gnuradio-core/src/utils/plot_freq_response.m | |
| parent | 452defdb4a78e9e826740ddf4b9673e926c568a4 (diff) | |
| parent | 24b640997ba7fee0c725e65f401f5cbebdab8d08 (diff) | |
| download | gnuradio-1826d0763c8595997f5f4af1fdb0354e9c0998ad.tar.gz gnuradio-1826d0763c8595997f5f4af1fdb0354e9c0998ad.tar.bz2 gnuradio-1826d0763c8595997f5f4af1fdb0354e9c0998ad.zip | |
README change
Diffstat (limited to 'gnuradio-core/src/utils/plot_freq_response.m')
| -rw-r--r-- | gnuradio-core/src/utils/plot_freq_response.m | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/gnuradio-core/src/utils/plot_freq_response.m b/gnuradio-core/src/utils/plot_freq_response.m new file mode 100644 index 000000000..335c51d62 --- /dev/null +++ b/gnuradio-core/src/utils/plot_freq_response.m @@ -0,0 +1,36 @@ +# +# 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 |