Module « scipy.signal »

Fonction dstep - module scipy.signal

Signature de la fonction dstep

def dstep(system, x0=None, t=None, n=None) 

Description

dstep.__doc__

    Step response of discrete-time system.

    Parameters
    ----------
    system : tuple of array_like
        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
        Output time points, as a 1-D array.
    yout : tuple of ndarray
        Step response of system.  Each element of the tuple represents
        the output of the system based on a step response to each input.

    See Also
    --------
    step, dimpulse, dlsim, cont2discrete

    Examples
    --------
    >>> from scipy import signal
    >>> import matplotlib.pyplot as plt

    >>> butter = signal.dlti(*signal.butter(3, 0.5))
    >>> t, y = signal.dstep(butter, n=25)
    >>> plt.step(t, np.squeeze(y))
    >>> plt.grid()
    >>> plt.xlabel('n [samples]')
    >>> plt.ylabel('Amplitude')