def as_unit(self, unit, location='suffix', *args, **kwargs):
        """Format subset as with units

        :param unit: string to use as unit
        :param location: prefix or suffix
        :param subset: Pandas subset
        """
        f = Formatter(
            as_unit(unit, location=location),
            args,
            kwargs
        )
        return self._add_formatter(f)
Format subset as with units

        :param unit: string to use as unit
        :param location: prefix or suffix
        :param subset: Pandas subset