'Return an instance with the array collapsed into one dimension.
Parameters are as for :meth:`~numpy.ndarray.ravel`. Note that it is
not always possible to unravel an array without copying the data.
If you want an error to be raise if the data is copied, you should
should assign shape ``(-1,)`` to the shape attribute.'

def ravel(self, *args, **kwargs):

    return self._apply(u'ravel', *args, **kwargs)
