python 回归与渐度下降

Question

y=4+5x+2x^2  (-10<x<10)

用python画

Answer 1

>>> import numpy as np
>>> import matplotlib.pyplot as plt
>>> x = np.linspace(-10, 10, 300)
>>> y = 4 + 5*x + 2*np.power(x,2)
>>> plt.plot(x, y)
[<matplotlib.lines.Line2D object at 0x000001AE24EB9F48>]
>>> plt.show()