如何绘制pyplot.hist2d中每个“单元格”中的点的百分比？

import numpy as np
import matplotlib.pyplot as plt

# 生成随机数据
x = np.random.randn(1000)
y = np.random.randn(1000)

# 绘制二维直方图
hist, xedges, yedges = np.histogram2d(x, y, bins=10)
extent = [xedges[0], xedges[-1], yedges[0], yedges[-1]]
plt.imshow(hist.T, extent=extent, origin='lower', cmap='Blues')

# 计算每个“单元格”中的点的百分比
total_points = len(x)
percentages = (hist / total_points) * 100

# 在每个“单元格”中添加文本标签
for i in range(hist.shape[0]):
    for j in range(hist.shape[1]):
        plt.text(xedges[i], yedges[j], f'{percentages[i, j]:.2f}%', ha='center', va='center', color='white')

# 添加颜色栏
plt.colorbar()

# 显示图形
plt.show()