``x.shape + (deg + 1,)``, where The last index is the degree of the
    corresponding Hermite polynomial.  The dtype will be the same as
    the converted `x`.

Examples
--------
>>> import numpy as np
>>> from numpy.polynomial.hermite import hermvander
>>> x = np.array([-1, 0, 1])
>>> hermvander(x, 3)
array([[ 1., -2.,  2.,  4.],
       [ 1.,  0., -2., -0.],
       [ 1.,  2.,  2., -4.]])

r-