X, Y = np.meshgrid(x, y) 代表的是将x中每一个数据和y中每一个数据组合生成很多点,然后将这些点的x坐标放入到X中,y坐标放入Y中,并且相应位置是对应的
即
如: x = [1, 2, 3, 4]
y = [7, 8, 9]
x和y中的每一个元素组合生成
[[[1, 7], [2, 7], [3, 7], [4, 7]],
[[1, 8], [2, 8], [3, 8], [4, 8]],
[[1, 9], [2, 9], [3, 9], [4, 9]]]
然后
再分别放入X和Y中
X = [[1, 2, 3, 4],
[1, 2, 3, 4],
[1, 2, 3, 4]]
Y = [[7, 7, 7, 7],
[8, 8, 8, 8],
[9, 9, 9, 9],]
代码如下:
In [1]: import numpy as np
In [2]: import matplotlib.pyplot as plt
In [3]: x = np.linspace(1, 4, 4)
In [4]: x
Out[4]: array([1., 2., 3., 4.])
In [5]: y = np.linspace(7, 9, 3)
In [6]: y
Out[6]: array([7., 8., 9.])
In [7]: X, Y = np.meshgrid(x, y)
In [8]: X
Out[8]:
array([[1., 2., 3., 4.],
[1., 2., 3., 4.],
[1., 2., 3., 4.]])
In [9]: Y
Out[9]:
array([[7., 7., 7., 7.],
[8., 8., 8., 8.],
[9., 9., 9., 9.]])