python实现绘制函数图像

Posted 2021-12-08 ZhangJiQun.

目录

python实现绘制二次函数图像

python实现绘制三维函数图像

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python实现绘制二次函数图像

import matplotlib.pyplot as plt
import numpy as np
import math
x = np.linspace(-10, 10, 10)   #分别代表最小，最大，数量， 生成一个等差数列
y = x ** 2 + 1
plt.plot(x, y)
plt.show()

 

python实现绘制三维函数图像

import matplotlib as mpl
from mpl_toolkits.mplot3d import Axes3D
import numpy as np
import matplotlib.pyplot as plt

mpl.rcParams['legend.fontsize'] = 10

fig = plt.figure()
ax = fig.gca(projection='3d')
theta = np.linspace(-4 * np.pi, 4 * np.pi, 100)
z = np.linspace(-2, 2, 100)
r = z ** 2 + 1
x = r * np.sin(theta)
y = r * np.cos(theta)
ax.plot(x, y, z, label='parametric curve')
ax.legend()

plt.show()