/usr/share/octave/packages/control-3.0.0/isobsv.m is in octave-control 3.0.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 | ## Copyright (C) 2009-2015 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{bool}, @var{nobs}] =} isobsv (@var{sys})
## @deftypefnx {Function File} {[@var{bool}, @var{nobs}] =} isobsv (@var{sys}, @var{tol})
## @deftypefnx {Function File} {[@var{bool}, @var{nobs}] =} isobsv (@var{a}, @var{c})
## @deftypefnx {Function File} {[@var{bool}, @var{nobs}] =} isobsv (@var{a}, @var{c}, @var{e})
## @deftypefnx {Function File} {[@var{bool}, @var{nobs}] =} isobsv (@var{a}, @var{c}, @var{[]}, @var{tol})
## @deftypefnx {Function File} {[@var{bool}, @var{nobs}] =} isobsv (@var{a}, @var{c}, @var{e}, @var{tol})
## Logical check for system observability.
## For numerical reasons, @code{isobsv (sys)}
## should be used instead of @code{rank (obsv (sys))}.
##
## @strong{Inputs}
## @table @var
## @item sys
## @acronym{LTI} model. Descriptor state-space models are possible.
## @item a
## State matrix (n-by-n).
## @item c
## Measurement matrix (p-by-n).
## @item e
## Descriptor matrix (n-by-n).
## If @var{e} is empty @code{[]} or not specified, an identity matrix is assumed.
## @item tol
## Optional roundoff parameter. Default value is 0.
## @end table
##
## @strong{Outputs}
## @table @var
## @item bool = 0
## System is not observable.
## @item bool = 1
## System is observable.
## @item nobs
## Number of observable states.
## @end table
##
## @strong{Algorithm}@*
## Uses SLICOT AB01OD and TG01HD by courtesy of
## @uref{http://www.slicot.org, NICONET e.V.}
##
## @seealso{isctrb}
## @end deftypefn
## Author: Lukas Reichlin <lukas.reichlin@gmail.com>
## Created: October 2009
## Version: 0.4
function [bool, nobs] = isobsv (a, c = [], e = [], tol = [])
if (nargin == 0)
print_usage ();
elseif (isa (a, "lti")) # isobsv (sys), isobsv (sys, tol)
if (nargin > 2)
print_usage ();
endif
[bool, nobs] = isctrb (a.', c); # transpose is overloaded
elseif (nargin < 2 || nargin > 4)
print_usage ();
else # isobsv (a, c), isobsv (a, c, e), ...
[bool, nobs] = isctrb (a.', c.', e.', tol);
endif
endfunction
|