Determine whether system is stable
B = isstable(sys)
B = isstable(sys,'elem')
B = isstable(sys) returns 1 (true) if the dynamic system model sys has stable dynamics, and 0 (false) otherwise. If sys is a model array, then B is true if all models in sys are stable.
B = isstable(sys,'elem') returns a logical array of the same size as the model array sys. The logical array indicates which models in sys are stable.
isstable is only supported for analytical models with a finite number of poles.