Question

此函数返回一个新数组，其中从输入数组中删除了指定的子数组。 与insert（）函数一样，如果未使用axis参数，则输入数组将被展平。 该功能采用以下参数 -

Numpy.delete(arr, obj, axis)

Where,

Sr.No.	参数和描述
1	arr 输入数组
2	obj 可以是切片，整数或整数数组，指示要从输入数组中删除的子数组
3	axis 用于删除给定子阵列的轴。 如果没有给出，arr就会变平

例子 (Example)

import numpy as np 
a = np.arange(12).reshape(3,4) 
print 'First array:' 
print a 
print '\n'  
print 'Array flattened before delete operation as axis not used:' 
print np.delete(a,5) 
print '\n'  
print 'Column 2 deleted:'  
print np.delete(a,1,axis = 1) 
print '\n'  
print 'A slice containing alternate values from array deleted:' 
a = np.array([1,2,3,4,5,6,7,8,9,10]) 
print np.delete(a, np.s_[::2])

其产出如下 -

First array:
[[ 0 1 2 3]
 [ 4 5 6 7]
 [ 8 9 10 11]]
Array flattened before delete operation as axis not used:
[ 0 1 2 3 4 6 7 8 9 10 11]
Column 2 deleted:
[[ 0 2 3]
 [ 4 6 7]
 [ 8 10 11]]
A slice containing alternate values from array deleted:
[ 2 4 6 8 10]