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- ## Copyright (C) 1996 Auburn University. All Rights Reserved
- ##
- ## 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, 59 Temple Place, Suite 330, Boston, MA 02111 USA.
-
- ## function [systype, nout, nin, ncstates, ndstates] = minfo(inmat)
- ##
- ## MINFO: Determines the type of system matrix. INMAT can be
- ## a varying(*), system, constant, and empty matrix.
- ##
- ## Returns:
- ## systype can be one of:
- ## varying, system, constant, and empty
- ## nout is the number of outputs of the system
- ## nin is the number of inputs of the system
- ## ncstates is the number of continuous states of the system
- ## ndstates is the number of discrete states of the system
-
- function [systype, nout, nin, ncstates, ndstates] = minfo (inmat)
-
- ## Written by R. Bruce Tenison July 29, 1994
- ## Modified by David Clem November 13, 1994
- ## Modified by A. S. Hodel July 1995
-
- warning("minfo: obsolete. Use sys2ss, sys2tf, or sys2zp.");
-
- if (nargin ~= 1 )
- disp('MINFO: Wrong number of arguments')
- systype = nout = nin = ncstates = ndstates = [];
- endif
-
- [rr,cc] = size(inmat);
-
- ## Check for empty matrix first!
- if (isempty(inmat))
- systype = "empty";
- nout = nin = ncstates = ndstates = 0;
- return
-
- ## Check for Constant matrix
-
- elseif (rr == 1 || cc == 1)
- systype = "constant";
- nout = nin = ncstates = ndstates = 1;
- return
-
- ## Check for system type matrix
- elseif (inmat(rr,cc) == -Inf)
- systype = "system";
- ncstates = inmat(1,cc);
- ndstates = inmat(rr,1);
- nstates = ncstates + ndstates;
- nout = rr - nstates - 1;
- nin = cc - nstates - 1;
-
- ## Check for Varying type matrix
- elseif (inmat(rr,cc) == Inf)
- systype = "varying";
- npoints = inmat(rr,cc-1);
- nin = cc - 1;
- nout = rr / npoints;
- nstates = 0;
-
- ## Must be a standard matrix
- else
- systype = "constant";
- nin = cc;
- nout = rr;
- ncstates = 0;
- ndstates = 0;
- endif
- endfunction
-