我正在尝试使用自定义排序的类别(以不同颜色显示的元素)制作熊猫条形图。这是我的代码,我期望从下到上的类别顺序遵循“ catorder”:
import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
df2 = pd.DataFrame({"series":["ser1","ser1","ser1", "ser2", "ser2","ser2"],
"cate":["aatu","boiler","heat pump","aatu","boiler","heat pump"],
"val": [6,15,24,7,15, 21] })
ac2 = pd.pivot_table(df2, values = "val", index = "series", columns = "cate")
catorder= ["heat pump","aatu","boiler"]
ac2.columns = pd.CategoricalIndex(ac2.columns.values,
ordered=True,
categories=catorder)
ac2.sort_index(axis = 1)
fig = plt.figure(figsize=(6,3.5))
ax1 = fig.add_subplot(111)
ac2.plot.bar(stacked=True, ax = ax1)
plt.show()
问题是它不起作用。类别仍按字母顺序排列。有什么想法可以完成这项常见任务吗?