# Copyright (C) 1996,1998 A. Scottedward Hodel
#
# This file is part of Octave.
#
# Octave 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 2, or (at your option) any
# later version.
#
# Octave 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 Octave; see the file COPYING.  If not, write to the Free
# Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.

function [n,nz,m,p,yd] = sysdimensions(sys)
# [n,nz,m,p[,yd]] = sysdimensions(sys)
# return the number of states, inputs, and outputs in the system sys.
# inputs: sys: system data structure
# outputs:
#  n: number of continuous states
#  nz: number of discrete states
#  m: number of system inputs
#  p: number of system outputs
#  yd: is the discrete output vector: yd(ii) = 1 if output ii is sampled,
#   				    yd(ii) = 0 if output ii is continous
#
# see also: sysgetsignals, sysgettsam

if(nargout > 5 | nargin != 1)
  usage("[n,nz,m,p[,yd]] = sysdimensions(sys)");
elseif(!is_struct(sys))
  usage("[n,nz,m,p] = sysdimensions(sys)");
endif

n = sys.n;
nz = sys.nz;
m = rows(sys.inname);
p = rows(sys.outname);
yd = sys.yd;

endfunction
