Python | Calculate the difference between adjacent elements in a given list

Method # 1: Using zip()

       # Python code for demo  
  # calculate the difference  
  # between adjacent elements in the list  
   
   
  # initializing _list  
   ini_list   =   [  5  ,   4  ,   89  ,   12  ,   32  ,   45  ] 
   < br />  # print iniial_list  
   print   (  "intial_list"  ,   str   (ini_list)) 
   
  # Difference calculation   
  diff_list   =   []  
   for   x, y   in   zip   (ini_list [  0   ::], ini_list [  1   ::]): 
     diff_list.append (y   -   x)  
   
  # print a list of differences  
   print   ( " difference list: " ,   str   (diff_list))

Exit :

 intial_list [5, 4, 89, 12, 32, 45] difference list: [-1, 85, -77, 20, 13]

Method # 2: Taking a Naive Approach

# Python code for demo
# calculate the difference
# between adjacent elements in the list

# initializing _list

ini_list = [ 5 , 4 , 89 , 12 , 32 , 45 ]

# print iniial_list

print ( "intial_list" , str (ini_list))

# Difference calculation

diff_list = []

fo r i in range ( 1 , len (ini_list)):

diff_list.append (ini_list [i] - ini_list [i - 1 ])

# print a list of differences

print ( " difference list: " , str (diff_list))

Exit:

 intial_list [5, 4, 89, 12, 32, 45] difference list: [-1, 85, -77, 20, 13]

Method # 3: Using NumPy

# Python code for demo
# calculate the difference
# between adjacent elements in the list

   import   numpy as np 
   # initializing _list  
   ini_list   =   np .array ([  5  ,   4  ,   89  ,   12  ,   32  ,   45  ]) 
    
  # print iniial_list  
   print   (  "intial_list"  ,   str   (ini_list)) 
   
  # Difference calculation  
   diff_list   =   np. diff (ini_list) 
   
  # print a list of differences   
  print   (  "difference list:"  ,   str   (diff_list))

Exit :

 intial_list [5 4 89 12 32 45] difference list: [-1 85 - 77 20 13]

Python | Calculate the difference between adjacent elements in a given list

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