split

此函数将数组沿指定轴划分为子数组。 该函数有三个参数。

numpy.split(ary, indices_or_sections, axis)

Where,

例子 (Example)

import numpy as np 
a = np.arange(9) 
print 'First array:' 
print a 
print '\n'  
print 'Split the array in 3 equal-sized subarrays:' 
b = np.split(a,3) 
print b 
print '\n'  
print 'Split the array at positions indicated in 1-D array:' 
b = np.split(a,[4,7])
print b 

其输出如下 -

First array:
[0 1 2 3 4 5 6 7 8]
Split the array in 3 equal-sized subarrays:
[array([0, 1, 2]), array([3, 4, 5]), array([6, 7, 8])]
Split the array at positions indicated in 1-D array:
[array([0, 1, 2, 3]), array([4, 5, 6]), array([7, 8])]