@sh.add_function(dsp, outputs=['clutch_tc_mean_efficiency'])
def identify_clutch_tc_mean_efficiency(clutch_tc_efficiencies):
"""
Identify clutch or torque converter mean efficiency [-].
:param clutch_tc_efficiencies:
Clutch or torque converter efficiency [-].
:type clutch_tc_efficiencies: numpy.array
:return:
Clutch or torque converter mean efficiency [-].
:rtype: float
"""
from co2mpas.utils import reject_outliers
return reject_outliers(clutch_tc_efficiencies)[0]