numpy.vstack

numpy.stack函数的变量用于堆叠，以便垂直生成单个数组。

例

import numpy as np
a = np.array([[1,2],[3,4]])

print 'First array:'
print a
print '\n'  
b = np.array([[5,6],[7,8]])

print 'Second array:'
print b
print '\n'

print 'Vertical stacking:'
c = np.vstack((a,b))
print c

它会产生以下输出

First array:
[[1 2]
 [3 4]]

Second array:
[[5 6]
 [7 8]]

Vertical stacking:
[[1 2]
 [3 4]
 [5 6]
 [7 8]]