numpy的用法（一）

import numpy as np
import tensorflow as tf

# 生成等间隔数值点
x, y = np.mgrid[1:3:1, 2:4:0.5]
# 将x, y拉直，并合并配对为二维张量，生成二维坐标点
grid = np.c_[x.ravel(), y.ravel()]
print("x:
", x)
print("y:
", y)
print("x.ravel():
", x.ravel())
print("y.ravel():
", y.ravel())
print('grid:
', grid)

x:
 [[1. 1. 1. 1.]
 [2. 2. 2. 2.]]
y:
 [[2.  2.5 3.  3.5]
 [2.  2.5 3.  3.5]]
x.ravel():
 [1. 1. 1. 1. 2. 2. 2. 2.]
y.ravel():
 [2.  2.5 3.  3.5 2.  2.5 3.  3.5]
grid:
 [[1.  2. ]
 [1.  2.5]
 [1.  3. ]
 [1.  3.5]
 [2.  2. ]
 [2.  2.5]
 [2.  3. ]
 [2.  3.5]]