Unity-based normalization to scale data into 0-1 range.

            (values - min) / (max - min)

        Args:
            limits: tuple of (min, max) defining the normalization range

def norm(self, limits=None):
        """Unity-based normalization to scale data into 0-1 range.

            (values - min) / (max - min)

        Args:
            limits: tuple of (min, max) defining the normalization range
        """
        kwargs = {}
        if limits is not None:
            kwargs = {'min': limits[0], 'max': limits[1]}
        return dim(self, norm, **kwargs)