展示变量的趋势变化

mport matplotlib.pyplot as plt
import numpy as np

x = np.linspace(0.05, 10, 1000)  # x = 0.05到10的等间距1000个点
y = np.cos(x)  # y = cos(x)

# ls=图线风格, lw=图线宽度, label=图像标签
plt.plot(x, y, ls="-", lw="2", label="plot figure")  # 绘制线图
plt.legend()  # 绘制图例
plt.show()  # 显示图像