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import matplotlib.pyplot as plt

# 示例1 简单绘图示例

plt.plot([1, 2], [1, 2], 'r--+')

plt.show()

# 示例2

# 指定一个画板

fig = plt.figure()

# 指定画板后指定轴

# ax = fig.add_subplot(111)

ax1 = fig.add_subplot(221)

ax2 = fig.add_subplot(222)

ax3 = fig.add_subplot(224)

ax4 = fig.add_subplot(223)

# 设置轴的位置

# ax.set(xlim=[0.5, 4.5], ylim=[-2, 8], title='An Example Axes',

# ylabel='Y-Axis', xlabel='X-Axis')

plt.show()