以绘图方式创建总和的分组条形图

import matplotlib.pyplot as plt
import numpy as np

# 数据
categories = ['Category A', 'Category B', 'Category C']
sub_categories = ['Sub1', 'Sub2', 'Sub3']
data = {
    'Category A': [20, 34, 30],
    'Category B': [15, 32, 34],
    'Category C': [25, 30, 28]
}

# 设置条形图的位置和宽度
bar_width = 0.2
index = np.arange(len(sub_categories))

# 绘制分组条形图
fig, ax = plt.subplots()
for i, (category, values) in enumerate(data.items()):
    ax.bar(index + i * bar_width, values, bar_width, label=category)

# 添加标签和标题
ax.set_xlabel('Sub Categories')
ax.set_ylabel('Values')
ax.set_title('Grouped Bar Chart Example')
ax.set_xticks(index + bar_width)
ax.set_xticklabels(sub_categories)
ax.legend()

# 显示图表
plt.show()