2019/6/3 hstack

2019.06.03练习

np.vstack

在竖直方向上对数组进行合并
a1 = [1,2,3]
a2 = [4,5,6]

vstack [1 2 3]
[4 5 6]
vertical
hstack [1 2 3 4 5 6]
horizontal
二维的话就是
[1 2 ]
3 4

5 6
7 8

hstack
1 2 5 6
3 4 7 8