在分组和无子分组图中堆叠条形图

import matplotlib.pyplot as plt
import numpy as np

# 数据
categories = ['A', 'B', 'C']
subcategories = ['X', 'Y', 'Z']
values = np.array([
    [1, 2, 3],
    [4, 5, 6],
    [7, 8, 9]
])

# 创建堆叠条形图
fig, ax = plt.subplots()
ax.bar(categories, values[:, 0], label=subcategories[0])
for i in range(1, len(subcategories)):
    ax.bar(categories, values[:, i], bottom=np.sum(values[:, :i], axis=1), label=subcategories[i])

# 添加标签和标题
ax.set_xlabel('Categories')
ax.set_ylabel('Values')
ax.set_title('Stacked Bar Chart in Grouped Graph')
ax.legend()

plt.show()

import matplotlib.pyplot as plt
import numpy as np

# 数据
categories = ['A', 'B', 'C']
values = [10, 20, 30]

# 创建堆叠条形图
fig, ax = plt.subplots()
ax.bar(categories, values, label='Stacked')

# 添加标签和标题
ax.set_xlabel('Categories')
ax.set_ylabel('Values')
ax.set_title('Stacked Bar Chart in Non-Grouped Graph')
ax.legend()

plt.show()