numpy.resize

此函数返回具有指定大小的新数组。如果新大小大于原始大小，则包含原始条目的重复副本。该函数采用以下参数。

numpy.resize(arr, shape)

这里

序号	参数和描述
1	arr 要调整大小的输入数组
2	shape 生成的数组的新形状

例

import numpy as np
a = np.array([[1,2,3],[4,5,6]])

print 'First array:'
print a
print '\n'

print 'The shape of first array:'
print a.shape
print '\n'  
b = np.resize(a, (3,2))

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

print 'The shape of second array:'
print b.shape
print '\n'  
# Observe that first row of a is repeated in b since size is bigger

print 'Resize the second array:'
b = np.resize(a,(3,3))
print b

以上程序将产生以下输出

First array:
[[1 2 3]
 [4 5 6]]

The shape of first array:
(2, 3)

Second array:
[[1 2]
 [3 4]
 [5 6]]

The shape of second array:
(3, 2)

Resize the second array:
[[1 2 3]
 [4 5 6]
 [1 2 3]]