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sys2tf

PURPOSE

% Extract transfer function data from a system data structure.

SYNOPSIS

function [num, den, tsam, inname, outname] = sys2tf (Asys)

DESCRIPTION

% -*- texinfo -*-
% @deftypefn {Function File} {[@var{num}, @var{den}, @var{tsam}, @var{inname}, @var{outname}] =} sys2tf (@var{sys})
% Extract transfer function data from a system data structure.
%
% See @command{tf} for parameter descriptions.
%
% @strong{Example}
% @example
% octave:1> sys=ss([1 -2; -1.1,-2.1],[0;1],[1 1]);
% octave:2> [num,den] = sys2tf(sys)
% num = 1.0000  -3.0000
% den = 1.0000   1.1000  -4.3000
% @end example
% @end deftypefn

CROSS-REFERENCE INFORMATION

This function calls:

is_siso % Returns nonzero if the system data structure
sysdimensions % return the number of states, inputs, and/or outputs in the system
sysgetsignals % Get signal names from a system
sysgettsam % Return the sampling time of the system @var{sys}.
sysupdate % Update the internal representation of a system.

This function is called by:

rlocus %
sys2fir %
sysadd % returns @var{sys} = @var{gsys} + @var{hsys}.
sysout % print out a system data structure in desired format
sysrepdemo % Tutorial for the use of the system data structure functions.
sysscale % scale inputs/outputs of a system.
syssub % Return @math{sys = Gsys - Hsys}.