def __init__(self, halflife_mu_ms, halflife_power_ms, fs, car=True):
    self.alpha_mu = self.hl2alpha(((fs * halflife_mu_ms) / 1000.0))
    self.alpha_power = self.hl2alpha(((fs * halflife_power_ms) / 1000.0))
    self.car = car
    self.sX_N = None
    self.sX = None
    self.sXX_N = None
    self.sXX = None
def __init__(self, halflife_mu_ms, halflife_power_ms, fs, car=True):
    self.alpha_mu = self.hl2alpha(((fs * halflife_mu_ms) / 1000.0))
    self.alpha_power = self.hl2alpha(((fs * halflife_power_ms) / 1000.0))
    self.car = car
    self.sX_N = None
    self.sX = None
    self.sXX_N = None
    self.sXX = None