def untransform_NLPD(self, NLPD):
    return (NLPD + np.hstack((np.array([np.log(self.scalar.std_).sum()]), np.log(self.scalar.std_))))
def untransform_NLPD(self, NLPD):
    return (NLPD + np.hstack((np.array([np.log(self.scalar.std_).sum()]), np.log(self.scalar.std_))))