/usr/share/octave/packages/ocs-0.1.5/sbn/Minductors.m is in octave-ocs 0.1.5-2+deb9u1.
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 | ## Copyright (C) 2006,2007,2008 Carlo de Falco
##
## This file is part of:
## OCS - A Circuit Simulator for Octave
##
## OCS 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.
##
## This program 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 this program (see the file LICENSE); if not,
## see <http://www.gnu.org/licenses/>.
##
## author: Carlo de Falco <cdf _AT_ users.sourceforge.net>
## -*- texinfo -*-
##
## @deftypefn{Function File} @
## {[@var{a},@var{b},@var{c}]=}Minductors(@var{string},@var{parameters},@
## @var{parameternames},@var{extvar},@var{intvar},@var{t})
##
## SBN file implementing models for inductors.
##
## @var{string} is used to select among models. Parameters are listed
## as inner items. Possible models are:
##
## @enumerate
## @item @var{string} = "LIN" (Linear inductor model)
## @itemize @minus
## @item L -> inductance value
## @end itemize
## @end enumerate
##
## See the @cite{IFF file format specifications} for details about
## the output structures.
##
## @seealso{prs_iff,asm_initialize_system,asm_build_system}
## @end deftypefn
function [a,b,c] = Minductors (string,parameters,parameternames,extvar,intvar,t)
if isempty(intvar)
intvar = [0 0];
endif
switch string
case "LIN"
for ii=1:length(parameternames)
eval([parameternames{ii} "=" num2str(parameters(ii)) ";"])
endfor
phi = intvar(1);
jl = intvar(2);
a = [0 0 0 0;
0 0 0 0;
0 0 1 0;
0 0 0 0];
b = [0 0 0 1;
0 0 0 -1;
-1 1 0 0;
0 0 1 -L];
c = [0 0 0 0]';
otherwise
error (["unknown section:" string])
endswitch
endfunction
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