/usr/share/octave/packages/control-2.6.2/@ss/__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 49 50 51 52 53 54 | ## 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 of SS models.
## Author: Lukas Reichlin <lukas.reichlin@gmail.com>
## Created: May 2012
## Version: 0.1
function sys = __ctranspose__ (sys, ct)
a = sys.a;
b = sys.b;
c = sys.c;
d = sys.d;
e = sys.e;
if (ct) # continuous-time
sys.a = -a.';
sys.b = -c.';
sys.c = b.';
sys.d = d.';
sys.e = e.';
sys.stname = repmat ({""}, rows (a), 1);
else # discrete-time
[n, m] = size (b);
p = rows (c);
if (isempty (e))
e = eye (n);
endif
sys.a = blkdiag (e.', eye (p));
sys.b = [zeros(n, p); -eye(p)];
sys.c = [b.', zeros(m, p)];
sys.d = d.';
sys.e = [a.', c.'; zeros(p, n+p)];
sys.stname = repmat ({""}, n+p, 1);
endif
endfunction
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