📅  最后修改于: 2020-11-08 07:28:30             🧑  作者: Mango
颤动图将速度矢量显示为箭头,在点(x,y)处具有分量(u,v)。
quiver(x,y,u,v)
上面的命令在x和y中每个对应的元素对中指定的坐标处将矢量绘制为箭头。
下表列出了Quiver图的不同参数-
x | 1D or 2D array, sequence. The x coordinates of the arrow locations |
y | 1D or 2D array, sequence. The y coordinates of the arrow locations |
u | 1D or 2D array, sequence. The x components of the arrow vectors |
v | 1D or 2D array, sequence. The y components of the arrow vectors |
c | 1D or 2D array, sequence. The arrow colors |
以下代码绘制了一个简单的颤动图-
import matplotlib.pyplot as plt
import numpy as np
x,y = np.meshgrid(np.arange(-2, 2, .2), np.arange(-2, 2, .25))
z = x*np.exp(-x**2 - y**2)
v, u = np.gradient(z, .2, .2)
fig, ax = plt.subplots()
q = ax.quiver(x,y,u,v)
plt.show()