'Adds a skew in place.
*xShear* and *yShear* are the shear angles along the *x*- and
*y*-axes, respectively, in degrees.
Returns *self*, so this method can easily be chained with more
calls to :meth:`rotate`, :meth:`rotate_deg`, :meth:`translate`
and :meth:`scale`.'

def skew_deg(self, xShear, yShear):

    return self.skew(np.deg2rad(xShear), np.deg2rad(yShear))
