@coeff_func
def periodic_(t, alpha=1, beta=1):
    return 0.5 * beta * np.sin(0.1 * alpha * t)
abs(0.5*beta*sin(0.1*alpha*t + alpha*beta))
dataset/ETHPy150Open CamDavidsonPilon/lifelines/lifelines/generate_datasets.py/periodic_