concatenate

连接是指加入。 此函数用于沿指定轴连接两个或多个相同形状的数组。 该函数采用以下参数。

numpy.concatenate((a1, a2, ...), axis)

Where,

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'  
# both the arrays are of same dimensions 
print 'Joining the two arrays along axis 0:' 
print np.concatenate((a,b)) 
print '\n'  
print 'Joining the two arrays along axis 1:' 
print np.concatenate((a,b),axis = 1)

其输出如下 -

First array:
[[1 2]
 [3 4]]
Second array:
[[5 6]
 [7 8]]
Joining the two arrays along axis 0:
[[1 2]
 [3 4]
 [5 6]
 [7 8]]
Joining the two arrays along axis 1:
[[1 2 5 6]
 [3 4 7 8]]