获得一个网格
nx,ny = (3,2)
x = np.linspace(0,1,nx)
#[ 0. 0.5 1. ]
y = np.linspace(0,1,ny)
# [0. 1.]
xv,yv = np.meshgrid(x,y)
‘‘‘
xv
[[ 0. 0.5 1. ]
[ 0. 0.5 1. ]]
yv
[[ 0. 0. 0.]
[ 1. 1. 1.]]
‘‘‘
原文：https://www.cnblogs.com/liujianing/p/13371287.html