/usr/share/octave/packages/control-2.6.2/@lti/size.m is in octave-control 2.6.2-1build1.
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 81 82 83 84 85 86 87 88 89 90 91 | ## 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{nvec} =} size (@var{sys})
## @deftypefnx {Function File} {@var{n} =} size (@var{sys}, @var{dim})
## @deftypefnx {Function File} {[@var{p}, @var{m}] =} size (@var{sys})
## @acronym{LTI} model size, i.e. number of outputs and inputs.
##
## @strong{Inputs}
## @table @var
## @item sys
## @acronym{LTI} system.
## @item dim
## If given a second argument, @command{size} will return the size of the
## corresponding dimension.
## @end table
##
## @strong{Outputs}
## @table @var
## @item nvec
## Row vector. The first element is the number of outputs (rows) and the second
## element the number of inputs (columns).
## @item n
## Scalar value. The size of the dimension @var{dim}.
## @item p
## Number of outputs.
## @item m
## Number of inputs.
## @end table
## @end deftypefn
## Author: Lukas Reichlin <lukas.reichlin@gmail.com>
## Created: September 2009
## Version: 0.2
function [n, varargout] = size (sys, dim = 0)
if (nargin > 2)
print_usage ();
endif
p = numel (sys.outname); # WARNING: system matrices may change without
m = numel (sys.inname); # being noticed by the i/o names!
switch (dim)
case 0
switch (nargout)
case 0
if (p == 1)
stry = "";
else
stry = "s";
endif
if (m == 1)
stru = "";
else
stru = "s";
endif
disp (sprintf ("LTI model with %d output%s and %d input%s.", p, stry, m, stru));
case 1
n = [p, m];
case 2
n = p;
varargout{1} = m;
otherwise
print_usage ();
endswitch
case 1
n = p;
case 2
n = m;
otherwise
print_usage ();
endswitch
endfunction
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