def vstack(self, a=None, name='ar'):
        if not a is None:
            a = a
        elif name == 'ar':
            a = self.ar
        elif name == 'ma':
            a = self.ma
        else:
            raise ValueError('no array or name given')
        return a.reshape(-1, self.nvarall)

    #@property
Calculate the Damerau-Levenshtein distance between sequences.
dataset/ETHPy150Open statsmodels/statsmodels/statsmodels/tsa/varma_process.py/VarmaPoly.vstack--crossover with--dataset/ETHPy150Open ProgVal/Limnoria/src/utils/seq.py/dameraulevenshtein