@property<EOL><INDENT>def xunit(self):<DEDENT>
try:<EOL><INDENT>return self._dx.unit<EOL><DEDENT>except AttributeError:<EOL><INDENT>try:<EOL><INDENT>return self._x0.unit<EOL><DEDENT>except AttributeError:<EOL><INDENT>return self._default_xunit<EOL><DEDENT><DEDENT>
Unit of x-axis index

        :type: `~astropy.units.Unit`