sysdimensions

PURPOSE

SYNOPSIS

DESCRIPTION

% -*- texinfo -*-
% @deftypefn {Function File} {[@var{n}, @var{nz}, @var{m}, @var{p}, @var{yd}] =} sysdimensions (@var{sys}, @var{opt})
% return the number of states, inputs, and/or outputs in the system
% @var{sys}.
%
% @strong{Inputs}
% @table @var
% @item sys
% system data structure
%
% @item opt
% String indicating which dimensions are desired.  Values:
% @table @code
% @item 'all'
% (default) return all parameters as specified under Outputs below.
%
% @item 'cst'
% return @var{n}= number of continuous states
%
% @item 'dst'
% return @var{n}= number of discrete states
%
% @item 'in'
% return @var{n}= number of inputs
%
% @item 'out'
% return @var{n}= number of outputs
% @end table
% @end table
%
% @strong{Outputs}
% @table @var
% @item  n
%  number of continuous states (or individual requested dimension as specified
% by @var{opt}).
% @item  nz
%  number of discrete states
% @item  m
%  number of system inputs
% @item  p
%  number of system outputs
% @item  yd
%  binary vector; @var{yd}(@var{ii}) is nonzero if output @var{ii} is
% discrete.
% @math{yd(ii) = 0} if output @var{ii} is continuous
% @end table
% @seealso{sysgetsignals, sysgettsam}
% @end deftypefn

CROSS-REFERENCE INFORMATION

• sysgetsignals % Get signal names from a system

• bode % If no output arguments are given: produce Bode plots of a system; otherwise,
• buildssic %
• c2d %
• d2c % Convert a discrete (sub)system into a purely continuous one.
• dcgain % Returns dc-gain matrix. If dc-gain is infinite
• dlqg % O B S O L E T E * * * D O N O T U S E~
• dre % Solve the differential Riccati equation
• h2syn % Design
• hinfnorm % Computes the
• hinfsyn %
• is_dgkf % Determine whether a continuous time state space system meets
• is_digital % Return nonzero if system is digital.
• is_siso % Returns nonzero if the system data structure
• lqg % Design a linear-quadratic-gaussian optimal controller for the system
• lsim % Produce output for a linear simulation of a system; produces
• ltifr % Linear time invariant frequency response of single-input systems.
• parallel % Forms the parallel connection of two systems.
• place % Computes the matrix @var{K} such that if the state
• starp %
• sys2ss % Extract state space representation from system data structure.
• sys2tf % Extract transfer function data from a system data structure.
• sys2zp %@deftypefn {Function File} {[@var{zer}, @var{pol}, @var{k}, @var{tsam}, @var{inname}, @var{outname}] =} sys2zp (@var{sys})
• sysadd % returns @var{sys} = @var{gsys} + @var{hsys}.
• sysappend % appends new inputs and/or outputs to a system
• syschtsam % This function changes the sampling time (tsam) of the system. Exits with
• sysconnect % Close the loop from specified outputs to respective specified inputs
• syscont % Extract the purely continuous subsystem of an input system.
• sysdisc %
• sysdup % Duplicate specified input/output connections of a system
• sysgroup % Combines two systems into a single system.
• sysmin % Returns a minimal (or reduced order) system
• sysmult % Compute @math{sys = Asys*Bsys} (series connection):
• sysout % print out a system data structure in desired format
• sysprune % Extract specified inputs/outputs from a system
• sysrepdemo % Tutorial for the use of the system data structure functions.
• sysscale % scale inputs/outputs of a system.
• syssetsignals % change the names of selected inputs, outputs and states.
• syssub % Return @math{sys = Gsys - Hsys}.
• zp2ss % Conversion from zero / pole to state space.