import matplotlib.pyplot as plt
import numpy as np
 
# 示例数据：每分钟的收益（假设 15 分钟内有 15 个数据点）
minutes = np.arange(1, 16)  # 1 到 15 分钟
earnings = np.random.uniform(-2, 3, 15)  # 随机生成的收益数据
 
# 创建柱状图
plt.figure(figsize=(10, 6))
plt.bar(minutes, earnings, color=np.where(earnings >= 0, 'green', 'red'), alpha=0.7)
 
# 添加标题和标签
plt.title('15 分钟内的收益柱状图', fontsize=16)
plt.xlabel('分钟', fontsize=12)
plt.ylabel('收益', fontsize=12)
 
# 添加网格线（可选）
plt.grid(axis='y', linestyle='--', alpha=0.7)
 
# 显示图形
plt.show()

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