/usr/share/octave/packages/control-2.6.2/@lti/ctranspose.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 | ## 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 -*-
## Conjugate transpose or pertransposition of @acronym{LTI} objects.
## Used by Octave for "sys'".
## For a transfer-function matrix G, G' denotes the conjugate
## of G given by G.'(-s) for a continuous-time system or G.'(1/z)
## for a discrete-time system.
## The frequency response of the pertransposition of G is the
## Hermitian (conjugate) transpose of G(jw), i.e.
## freqresp (G', w) = freqresp (G, w)'.
## @strong{WARNING:} Do @strong{NOT} use this for dual problems,
## use the transpose "sys.'" (note the dot) instead.
## Author: Lukas Reichlin <lukas.reichlin@gmail.com>
## Created: May 2012
## Version: 0.1
function sys = ctranspose (sys)
if (nargin != 1) # prevent sys = ctranspose (sys1, sys2, sys3, ...)
error ("lti: ctranspose: this is an unary operator");
endif
[p, m] = size (sys);
ct = isct (sys);
sys = __ctranspose__ (sys, ct);
sys.inname = repmat ({""}, p, 1);
sys.outname = repmat ({""}, m, 1);
endfunction
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