NumPy numpy.resize 函数

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  简述

  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)
  

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  参数说明

  序号	参数及说明
  1	arr 要调整大小的输入数组
  2	shape 结果数组的新形状

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  例子

  
  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
  

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  上述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]]
  

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