我正在尝试复制一个带有分量的二维向量地图
v = 100/a * exp(-1/a^2 * ((x+0.55)^2+y^2))(-y,x) - 100/a * exp(-1/a^2 * ((x-0.55)^2+y^2))(-y,x)
这是我的代码。它没有生成我想要的地图(请参见附带的向量地图)。有人可以帮我吗?
import numpy as np
import matplotlib.pyplot as plt
import math
grid_resolution = 25
grid_size = 2*grid_resolution+1
a = 0.2
x = np.linspace(-1,1,grid_size)
y = np.linspace(-1,1,grid_size)
X,Y = np.meshgrid(x, y)
vx = np.zeros((grid_size,grid_size))
vy = np.zeros((grid_size,grid_size))
for i in range(0,grid_size):
for j in range(0,grid_size):
x0 = x[j]
y0 = y[i]
xx = (x0 + 0.55) ** 2 + y0 ** 2
yy = (x0 - 0.55) ** 2 + y0 ** 2
expf1 = math.exp(-xx / (a ** 2))
expf2 = math.exp(-yy / (a ** 2))
vx[i,j] = 100 / a * (-expf1 + expf2) * y0
vy[i,j] = 100 / a * (expf1 - expf2) * x0
fig, ax = plt.subplots()
ax.quiver(X, Y, vx, vy)
ax.set_aspect('equal')
plt.show()
vx
和vy
未被定义。 - Michael Szczesny