Question

numpy.stack函数的变量用于堆叠，以便垂直生成单个数组。

例子 (Example)

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]]