def singleaxis(self, apparent_zenith, apparent_azimuth):
tracking_data = singleaxis(apparent_zenith, apparent_azimuth,<EOL>self.axis_tilt, self.axis_azimuth,<EOL>self.max_angle,<EOL>self.backtrack, self.gcr)<EOL>return tracking_data<EOL>
Get tracking data. See :py:func:`pvlib.tracking.singleaxis` more
detail.

Parameters
----------
apparent_zenith : float, 1d array, or Series
    Solar apparent zenith angles in decimal degrees.

apparent_azimuth : float, 1d array, or Series
    Solar apparent azimuth angles in decimal degrees.

Returns
-------
tracking data