def autocorr_coeff ( x , t , tau1 , tau2 ) : return corr_coeff ( x , x , t , tau1 , tau2 )
corrcoef python returns nan
Calculate the autocorrelation coefficient .
def autocorr_coeff(x, t, tau1, tau2):
    """Calculate the autocorrelation coefficient."""
    return corr_coeff(x, x, t, tau1, tau2)