我想比較數(shù)據(jù)框中的數(shù)據(jù)，將一些數(shù)據(jù)繪制為線，將其他列繪制為散點(diǎn)圖。我的實(shí)際數(shù)據(jù)是模型輸出和觀察的組合，我希望觀察是散點(diǎn)，模型是線。觀察值有很多 Nan 值（大多數(shù)時(shí)間步驟沒(méi)有觀察值）。這個(gè) MWE 重復(fù)了我遇到的問(wèn)題import numpy as npimport pandas as pdimport matplotlib.pyplot as pltbase = datetime.datetime.today()date_list = [base - datetime.timedelta(days=x) for x in range(40)]df = pd.DataFrame(data = {    "Time": date_list,    "Chocolate": np.random.rand(40),     "Strawberry": np.random.rand(40),     "Fake Chocolate": np.random.rand(40),     "Fake Strawberry": np.random.rand(40), })df.iloc[3,3] = np.nanax1 = df.plot(x = 'Time', y = ["Chocolate","Strawberry"])ax1 = df.plot(x = 'Time', y = ["Chocolate","Strawberry"])ax2 = df.plot.scatter(x = 'Time', y = ['Fake Chocolate'], marker = '^', ax = ax1)ax3 = df.plot.scatter(x = 'Time', y = ['Fake Strawberry'], marker = '*', ax = ax1, color = '#ff7f0e')我想要像第一個(gè)圖中那樣的 x 軸，所以采用線圖的樣式，你沒(méi)有每個(gè)日期都試圖在一個(gè)很小的空間中打印。我該怎么做呢？我正在使用ax1.set來(lái)設(shè)置 x 和 y 軸標(biāo)簽。如果我可以偷偷提出第二個(gè)問(wèn)題，為什么可以使用散點(diǎn)圖y = []而不是散點(diǎn)圖來(lái)做多條線？