/usr/share/octave/packages/control-2.6.2/@lti/freqresp.m is in octave-control 2.6.2-1build1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 | ## Copyright (C) 2009-2014 Lukas F. Reichlin
##
## This file is part of LTI Syncope.
##
## LTI Syncope 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.
##
## LTI Syncope 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 LTI Syncope. If not, see <http://www.gnu.org/licenses/>.
## -*- texinfo -*-
## @deftypefn{Function File} {@var{H} =} freqresp (@var{sys}, @var{w})
## Evaluate frequency response at given frequencies.
##
## @strong{Inputs}
## @table @var
## @item sys
## @acronym{LTI} system.
## @item w
## Vector of frequency values.
## @end table
##
## @strong{Outputs}
## @table @var
## @item H
## Array of frequency response. For a system with m inputs and p outputs, the array @var{H}
## has dimensions [p, m, length (w)].
## The frequency response at the frequency w(k) is given by H(:,:,k).
## @end table
##
## @seealso{dcgain}
## @end deftypefn
## Author: Lukas Reichlin <lukas.reichlin@gmail.com>
## Created: October 2009
## Version: 0.2
function H = freqresp (sys, w)
if (nargin != 2) # case freqresp () not possible
print_usage ();
endif
if (! is_real_vector (w)) # catches freqresp (sys, sys) and freqresp (w, sys) as well
error ("freqresp: second argument must be a real vector");
endif
H = __freqresp__ (sys, w);
endfunction
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