如何使用matplotlib绘制多个类别？

import matplotlib.pyplot as plt

# 假设有两个类别的数据 points1 和 points2
points1 = [[1, 2], [3, 4], [5, 6]]
points2 = [[2, 3], [4, 5], [6, 7]]

# 绘制类别1的数据点，颜色为红色
plt.plot([point[0] for point in points1], [point[1] for point in points1], 'ro')

# 绘制类别2的数据点，颜色为蓝色
plt.plot([point[0] for point in points2], [point[1] for point in points2], 'bo')

plt.show()

import matplotlib.pyplot as plt

# 假设有两个类别的数据 points1 和 points2
points1 = [[1, 2], [3, 4], [5, 6]]
points2 = [[2, 3], [4, 5], [6, 7]]

# 绘制类别1的数据点，标记符号为圆圈
plt.scatter([point[0] for point in points1], [point[1] for point in points1], marker='o')

# 绘制类别2的数据点，标记符号为方块
plt.scatter([point[0] for point in points2], [point[1] for point in points2], marker='s')

plt.show()

import matplotlib.pyplot as plt

# 假设有两个类别的数据 points1 和 points2
points1 = [[1, 2], [3, 4], [5, 6]]
points2 = [[2, 3], [4, 5], [6, 7]]

# 创建一个2x2的子图，第1个子图用于类别1，第2个子图用于类别2
fig, axs = plt.subplots(2, 2)

# 在第1个子图中绘制类别1的数据点
axs[0, 0].plot([point[0] for point in points1], [point[1] for point in points1], 'ro')

# 在第2个子图中绘制类别2的数据点
axs[0, 1].plot([point[0] for point in points2], [point[1] for point in points2], 'bo')

plt.show()