240615

plt/arctanx&x.py

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+import numpy as np
+import matplotlib.pyplot as plt
+
+# 定义 x 的范围
+x = np.linspace(-3, 3, 400)
+
+# 计算 y 的值
+y_arctan = np.arctan(x)
+y_linear = x
+
+# 绘制图形
+plt.figure(figsize=(8, 6))
+plt.plot(x, y_arctan, label='y = arctan(x)', color='blue')
+plt.plot(x, y_linear, label='y = x', color='red', linestyle='--')
+plt.xlabel('x')
+plt.ylabel('y')
+plt.title('Plot of y = arctan(x) and y = x')
+
+# 获取当前坐标轴
+ax = plt.gca()
+
+# 设置 x 轴和 y 轴的线条粗细
+ax.spines['bottom'].set_linewidth(2)
+ax.spines['left'].set_linewidth(2)
+
+plt.legend()
+plt.grid(True)  # 如果需要网格线，可以保留这行
+plt.savefig('arctanx&x.png')
+plt.show()