bool = isdt(sys) returns a logical value of 1 (true) if the dynamic system model sys is a discrete-time model. The function returns a logical value of 0 (false) otherwise.
Logical value indicating whether sys is a discrete-time model.
bool = 1 (true) if sys is a discrete-time model (sys.Ts ≠ 0). If sys is a continuous-time model, bool = 0 (false).
For a static gain, both isct and isdt return true unless you explicitly set the sample time to a nonzero value. If you do so, isdt returns true and isct returns false.
For arrays of models, bool is true if the models in the array are discrete.
