Mercurial > octave-nkf
view scripts/signal/freqz_plot.m @ 20645:395140e53656
Fix regression in svg output and simplify viewport handling (bug #44765)
* gl2ps-renderer.cc (glps-renderer::draw): remove check for GL2PS_NO_FEEDBACK, it it always true after EndViewport
* gl2ps-renderer.h (glps-renderer::draw_axes): call gl2psBegin(End)Viewport for every axes and check for GL2PS_NO_FEEDBACK after each axes.
* gl2ps-renderer.h (glps-renderer::draw_axes):remove unnecessary "naxes" attribute
author | Pantxo Diribarne <pantxo.diribarne@gmail.com> |
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date | Mon, 12 Oct 2015 20:49:04 +0200 |
parents | 4197fc428c7d |
children |
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## Copyright (C) 2002-2015 John W. Eaton ## ## This file is part of Octave. ## ## Octave 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 of the License, or (at ## your option) any later version. ## ## Octave 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 Octave; see the file COPYING. If not, see ## <http://www.gnu.org/licenses/>. ## -*- texinfo -*- ## @deftypefn {Function File} {} freqz_plot (@var{w}, @var{h}) ## @deftypefnx {Function File} {} freqz_plot (@var{w}, @var{h}, @var{freq_norm}) ## Plot the magnitude and phase response of @var{h}. ## ## If the optional @var{freq_norm} argument is true, the frequency vector ## @var{w} is in units of normalized radians. If @var{freq_norm} is false, or ## not given, then @var{w} is measured in Hertz. ## @seealso{freqz} ## @end deftypefn ## Author: Paul Kienzle <pkienzle@users.sf.net> function freqz_plot (w, h, freq_norm = false) if (nargin < 2 || nargin > 3) print_usage (); endif n = length (w); ## ## exclude zero-frequency ## h = h (2 : length (h)); ## w = w (2 : length (w)); ## n = n-1; mag = 20 * log10 (abs (h)); phase = unwrap (arg (h)); if (freq_norm) x_label = 'Normalized Frequency (\times\pi rad/sample)'; else x_label = "Frequency (Hz)"; endif subplot (2, 1, 1); plot (w, mag); grid ("on"); axis ([w(1), w(n)], "autoy"); xlabel (x_label); ylabel ("Magnitude (dB)"); subplot (2, 1, 2); plot (w, phase*360/(2*pi)); grid ("on"); axis ([w(1), w(n)], "autoy"); xlabel (x_label); ylabel ("Phase (degrees)"); endfunction