自相关函数

def solve():
    import numpy as np
    import matplotlib.pyplot as plt
    from statsmodels.tsa.stattools import acf
    np.random.seed(____)
    n = ____
    time = np.arange(____)
    ts = ____ * time + ____ * np.sin(____ * np.pi * time / ____) + np.random.normal(____, ____, n)
    lag_acf = acf(____)
    plt.figure(figsize=(____, ____))
    plt.stem(range(len(____)), lag_acf)
    plt.axhline(____, color='____', linestyle='____', alpha=____)
    plt.axhline(____)
    plt.xlabel(____)
    plt.ylabel(____)
    plt.title(____)
    plt.grid(____)
    plt.show()