'Plot the input time series.
Parameters
with_presample : bool, default: `False`
If `False`, the pre-sample data (the first `k_ar` values) will
not be plotted.'

def plot_data(self, with_presample=False):

    y = (self.y_all if with_presample else self.y_all[:, self.k_ar:])
    names = self.names
    dates = (self.dates if with_presample else self.dates[self.k_ar:])
    plot.plot_mts(y.T, names=names, index=dates)
