def range(self, channels=None):
        """
        Get the range of the specified channel(s).

        The range is a two-element list specifying the smallest and largest
        values that an event in a channel should have. Note that with
        floating point data, some events could have values outside the
        range in either direction due to instrument compensation.

        The range should be transformed along with the data when passed
        through a transformation function.

        The range of channel "n" is extracted from the $PnR parameter as
        ``[0, $PnR - 1]``.

        Parameters
        ----------
        channels : int, str, list of int, list of str
            Channel(s) for which to get the range. If None, return a list
            with the range of all channels, in the order of
            ``FCSData.channels``.

        Return
        ------
        array or list of arrays
            The range of the specified channel(s).

        """
        # Check default
        if channels is None:
            channels = self._channels

        # Get numerical indices of channels
        channels = self._name_to_index(channels)

        # Get the range of the specified channels
        if hasattr(channels, '__iter__') \
                and not isinstance(channels, six.string_types):
            return [self._range[ch] for ch in channels]
        else:
            return self._range[channels]
Get the range of the specified channel(s).

        The range is a two-element list specifying the smallest and largest
        values that an event in a channel should have. Note that with
        floating point data, some events could have values outside the
        range in either direction due to instrument compensation.

        The range should be transformed along with the data when passed
        through a transformation function.

        The range of channel "n" is extracted from the $PnR parameter as
        ``[0, $PnR - 1]``.

        Parameters
        ----------
        channels : int, str, list of int, list of str
            Channel(s) for which to get the range. If None, return a list
            with the range of all channels, in the order of
            ``FCSData.channels``.

        Return
        ------
        array or list of arrays
            The range of the specified channel(s).