is_digital

PURPOSE

SYNOPSIS

DESCRIPTION

% -*- texinfo -*-
% @deftypefn {Function File} {@var{digital} =} is_digital (@var{sys}, @var{eflg})
% Return nonzero if system is digital.
%
% @strong{Inputs}
% @table @var
% @item sys
% System data structure.
% @item eflg
% When equal to 0 (default value), exits with an error if the system 
% is mixed (continuous and discrete components); when equal to 1, print
% a warning if the system is mixed (continuous and discrete); when equal
% to 2, operate silently.
% @end table
%
% @strong{Output}
% @table @var
% @item digital
% When equal to 0, the system is purely continuous; when equal to 1, the
% system is purely discrete; when equal to -1, the system is mixed continuous 
% and discrete.
% @end table
% Exits with an error if @var{sys} is a mixed (continuous and discrete) system.
% @end deftypefn

CROSS-REFERENCE INFORMATION

• 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}.

• bode % If no output arguments are given: produce Bode plots of a system; otherwise,
• c2d %
• d2c % Convert a discrete (sub)system into a purely continuous one.
• damp % Displays eigenvalues, natural frequencies and damping ratios
• dcgain % Returns dc-gain matrix. If dc-gain is infinite
• dmr2d % convert a multirate digital system to a single rate digital system
• dre % Solve the differential Riccati equation
• h2norm % Computes the
• hinfnorm % Computes the
• is_detectable % Test for detectability (observability of unstable modes) of (@var{a}, @var{c}).
• is_dgkf % Determine whether a continuous time state space system meets
• is_stabilizable % Logical check for system stabilizability (i.e., all unstable modes are controllable).
• is_stable % Returns 1 if the matrix @var{a} or the system @var{sys}
• isct % Return true if the LTI system @var{sys} is continuous-time, false otherwise.
• isdt % Return true if the LTI system @var{sys} is discrete-time, false otherwise.
• lqg % Design a linear-quadratic-gaussian optimal controller for the system
• nichols % Produce Nichols plot of a system.
• nyquist % Produce Nyquist plots of a system; if no output arguments are given, Nyquist
• place % Computes the matrix @var{K} such that if the state
• pzmap % Plots the zeros and poles of a system in the complex plane.
• sys2fir %
• sysmin % Returns a minimal (or reduced order) system
• sysupdate % Update the internal representation of a system.
• tzero % Compute transmission zeros of a continuous system:
• zgreduce % Implementation of procedure REDUCE in (Emami-Naeini and Van Dooren,