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# scipy.signal.dimpulse

`scipy.signal.``dimpulse`(system, x0=None, t=None, n=None)

  Impulse response of discrete-time system.

  Parameters: | system : tuple of array_like or instance of `dlti` A tuple describing the system. The following gives the number of elements in the tuple and the interpretation: 1: (instance of `dlti`) 3: (num, den, dt) 4: (zeros, poles, gain, dt) 5: (A, B, C, D, dt) x0 : array_like, optional Initial state-vector. Defaults to zero. t : array_like, optional Time points. Computed if not given. n : int, optional The number of time points to compute (if t is not given).
  Returns: | tout : ndarray Time values for the output, as a 1-D array. yout : ndarray Impulse response of system. Each element of the tuple represents the output of the system based on an impulse in each input.

  See also

  `impulse`, `dstep`, `dlsim`, `cont2discrete`