# Python program explaining
# numpy.diff() method
 
   
# importing numpy
import numpy as geek
 
# input array
arr = geek.array([1, 3, 4, 7, 9])
  
print("Input array  : ", arr)
print("First order difference  : ", geek.diff(arr))
print("Second order difference : ", geek.diff(arr, n = 2))
print("Third order difference  : ", geek.diff(arr, n = 3))

Input array  :  [1 3 4 7 9]
First order difference  :  [2 1 3 2]
Second order difference :  [-1  2 -1]
Third order difference  :  [ 3 -3]

# Python program explaining
# numpy.diff() method
 
   
# importing numpy
import numpy as geek
 
# input array
arr = geek.array([[1, 2, 3, 5], [4, 6, 7, 9]])
  
print("Input array  : ", arr)
print("Difference when axis is 0 : ", geek.diff(arr, axis = 0))
print("Difference when axis is 1 : ", geek.diff(arr, axis = 1))

Input array  :  [[1 2 3 5]
 [4 6 7 9]]
Difference with axis 0 :  [[3 4 4 4]]
Difference with axis 1 :  [[1 1 2]
 [2 1 2]]