matplotlib -如何并排绘制条形图，以比较两列之间的值

import matplotlib.pyplot as plt
import numpy as np

# 创建数据
categories = ['A', 'B', 'C', 'D', 'E']
values1 = [10, 15, 7, 12, 9]
values2 = [8, 11, 9, 6, 13]

# 设置图形大小
fig, ax = plt.subplots(figsize=(8, 6))

# 设置条形图位置
bar_width = 0.35
index = np.arange(len(categories))

# 绘制第一列条形图
rects1 = ax.bar(index, values1, bar_width, label='Column 1')

# 绘制第二列条形图，位置向右偏移bar_width
rects2 = ax.bar(index + bar_width, values2, bar_width, label='Column 2')

# 设置x轴标签和标题
ax.set_xlabel('Categories')
ax.set_ylabel('Values')
ax.set_title('Comparison between Column 1 and Column 2')

# 设置x轴刻度标签
ax.set_xticks(index + bar_width / 2)
ax.set_xticklabels(categories)

# 添加图例
ax.legend()

# 显示图形
plt.show()