+
−## Copyright (C) 1996, 2000, 2002, 2003, 2004, 2005, 2006, 2007
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−##               Auburn University.  All rights reserved.
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−##
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−## This file is part of Octave.
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−##
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−## Octave is free software; you can redistribute it and/or modify it
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−## 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.
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−##
+
−## 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
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−## 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, see
+
−## <http://www.gnu.org/licenses/>.
+
−
+
−## -*- texinfo -*-
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−## @deftypefn {Function File} {} tfout (@var{num}, @var{denom}, @var{x})
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−## Print formatted transfer function @math{n(s)/d(s)} to the screen.
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−## @var{x} defaults to the string @code{"s"}
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−## @seealso{polyval, polyvalm, poly, roots, conv, deconv, residue,
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−## filter, polyderiv, polyinteg, polyout}
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−## @end deftypefn
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−
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−## Author: A. S. Hodel <a.s.hodel@eng.auburn.edu>
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−## Created: June 1995
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−
+
−function tfout (num, denom, x)
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−
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−  if (nargin < 2 ) | (nargin > 3) | (nargout != 0 )
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−    print_usage ();
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−  endif
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−
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−  if ( (!isvector(num)) | (!isvector(denom)) )
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−    error("tfout: first two argument must be vectors");
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−  endif
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−
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−  if (nargin == 2)
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−    x = "s";
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−  elseif( ! ischar(x) )
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−    error("tfout: third argument must be a string");
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−  endif
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−
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−  numstring = polyout(num,x);
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−  denomstring = polyout(denom,x);
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−  len = max(length(numstring),length(denomstring));
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−  if(len > 0)
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−    y = strrep(blanks(len)," ","-");
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−    disp(numstring)
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−    disp(y)
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−    disp(denomstring)
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−  else
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−    error ("tfout: empty transfer function")
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−  end
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−
+
−endfunction