我想比較數據框中的數據，將一些數據繪制為線，將其他列繪制為散點圖。我的實際數據是模型輸出和觀察的組合，我希望觀察是散點，模型是線。觀察值有很多 Nan 值（大多數時間步驟沒有觀察值）。這個 MWE 重復了我遇到的問題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')我想要像第一個圖中那樣的 x 軸，所以采用線圖的樣式，你沒有每個日期都試圖在一個很小的空間中打印。我該怎么做呢？我正在使用ax1.set來設置 x 和 y 軸標簽。如果我可以偷偷提出第二個問題，為什么可以使用散點圖y = []而不是散點圖來做多條線？
1 回答
飲歌長嘯
TA貢獻1951條經驗 獲得超3個贊
只需添加plt.xticks(rotation=45)到腳本的末尾就可以了。
import numpy as np
import pandas as pd
import matplotlib.pyplot as plt
import datetime
base = 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.nan
ax1 = 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')
plt.xticks(rotation=45);
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