Matplotlib -只显示大于某个值的数据

Question

我使用Matplotlib和Pandas来绘制数据。

但是，我只想在图上显示高于某一值的数据。

import matplotlib.pyplot as plt
import matplotlib.dates as mdates
import pandas as pd
# Importing the data using Pandas
BE = pd.read_csv("BE-4YRS.csv")
FR = pd.read_csv("FR-4YRS.csv")

fig, ax = plt.subplots()
ax.scatter(BE["Week"], BE["percent"], alpha=0.7, c="r", s=BE["percent"]*2, label="Belgium")
ax.scatter(FR["Week"], FR["percent"], alpha=0.7, c="b", s=FR["percent"]*2, label="France")
ax.xaxis.set_major_locator(mdates.WeekdayLocator(interval=1))
plt.legend()
plt.xticks(rotation=45)
plt.grid(True)

I tried with:

for i in BE["percent"]:
if i > 75:
print(i)

输出:

78
100
78
76
77
87

但是我无法得到这些值对应的日期

Answer 1

你可以这样做:

BE_CFT_18to21 = BE_CFT_18to21[BE_CFT_18to21.percent > 75]