3715的python哟

3715的python

#最后一题用第一个可以做！!真的我试了 但我函数敲错了 改一下函数就行！!
from sympy import *
x, y = symbols(‘x y’)
a = expand((2*x + y)**4)
a

simplify(cos(x)/sin(2*x))

limit(x*sin(1/x),x,0,’-’)

diff(exp(x)*cos(x))

integrate(sin(x)**3,x)

integrate(exp(x**1/2))

integrate(sin(x)**2,(x,0,pi/2))

integrate(1/(exp(x)+exp(-x)),(x,0,1))

solveset(x**5+1,x)

solution=solve((3x+4y-10,5x-2y-12),(x,y))
solution[x],solution[y]

import numpy as np
A=np.array([[2,5,7],[4,1,3],[6,9,5]])
A

np.linalg.inv(A)

a=np.array([[1,0,3],[2,5,1],[4,0,3]])
b=np.array([[3,1,2],[2,7,0],[5,1,1]])
np.dot(a,b)

import matplotlib.pyplot as plt
import numpy as np
import math
x = np.linspace(-10,10,1000)
y = [math.exp(-t) for t in x]
plt.plot(x, y)
plt.show()

下面三个不一定对，我先写在这里，到时候你们选择性的用，记得改一下解析式。
1
from pylab import *
from mpl_toolkits.mplot3d import Axes3D

x, y = meshgrid(arange(-5, 5.5, 0.05), arange(-5, 5.5, 0.05))
z = 1-x**-y**2/4

ax = gca(projection=‘3d’)

ax.plot_surface(x, y, z)

show()

2
from matplotlib import pyplot as plt
import numpy as np
from mpl_toolkits.mplot3d import Axes3D

fig = plt.figure()
ax = Axes3D(fig)
X = np.arange(-4, 4, 0.25)
Y = np.arange(-4, 4, 0.25)
X, Y = np.meshgrid(X, Y)
R = np.sqrt(X2 + Y2)
Z = X*Y

ax.plot_surface(X, Y, Z, rstride=1, cstride=1, cmap=‘rainbow’)

plt.draw()
plt.pause(10)
plt.savefig(‘3D.jpg’)
plt.close()

3
import numpy as np
import matplotlib.pyplot as mp
from mpl_toolkits.mplot3d import Axes3D

n = 1000
x, y = np.meshgrid(np.linspace(-3, 3, n),
np.linspace(-3, 3, n))

z = (1 - x / 2 + x ** 5 + y ** 3) *
np.exp(-x ** 2 - y ** 2)

fig = mp.figure(“3D Surface”, facecolor=“lightgray”)
mp.title(“3D Surface”, fontsize=18)

ax3d = Axes3D(fig)

ax3d.set_xlabel(“X”)
ax3d.set_ylabel(“Y”)
ax3d.set_zlabel(“Z”)
mp.tick_params(labelsize=10)

ax3d.plot_surface(x, y, z, cstride=20, rstride=20, cmap=“jet”)

mp.show()

本文地址：https://blog.csdn.net/Ayanokei/article/details/110915616