我有一個簡單的條形圖，上面有一個折線圖。import numpy as npimport matplotlib.pyplot as pltx = np.array(["one", "two", "three", "four"])a = np.array([1, 2, 3, 4])b = np.array([2, 4, 3, 1])fig, ax1 = plt.subplots()ax2 = ax1.twinx()ax1.bar(x, a, color="g")ax2.plot(x, b, color="r")# Problem is here.ax1.set_xticklabels(x, rotation="vertical", size=12)plt.show()當我運行它時，它工作正常。但我收到這個警告："""<ipython-input-65-9b40369b760b>:15: UserWarning: FixedFormatter should only be used together with FixedLocator  ax1.set_xticklabels(x, rotation="vertical", size=12)"""我需要知道的是如何避免這個警告。