这是示例数据。如何获得Y轴上的总金额和堆叠的四分之一,X轴上的区域和年份。
Region Year Quarter Sum Amount
A 2016 1 100
2 80
3 70
4 10
2017 1 90
2 50
3 60
4 30
B 2016 1 120
2 80
3 90
4 20
2017 2 80
3 100
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
import random
# data
random.seed(365)
data = {'Year': [random.choice([2016, 2017]) for _ in range(1000)],
'Region': [random.choice(['A', 'B']) for _ in range(1000)],
'Quarter': [random.choice([1, 2, 3, 4]) for _ in range(1000)],
'Value': [np.random.randint(10) for _ in range(1000)]}
# dataframe
df = pd.DataFrame(data)
# groupby
gb = df.groupby(['Region', 'Year', 'Quarter'])['Value'].sum().unstack()
# plot
gb.plot.bar(stacked=True)
plt.legend(title='Quarter', loc='center left', bbox_to_anchor=(1, 0.5))
plt.show()