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Find common values between two NumPy arrays

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  • Difficulty Level : Basic
  • Last Updated : 29 Aug, 2020
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In NumPy, we can find common values between two arrays with the help intersect1d(). It will take parameter two arrays and it will return an array in which all the common elements will appear.

Syntax: numpy.intersect1d(array1,array2)

Parameter :Two arrays.

Return :An array in which all the common element will appear.

Example 1:

Python




import numpy as np
  
  
ar1 = np.array([0, 1, 2, 3, 4])
ar2 = [1, 3, 4]
  
# Common values between two arrays
print(np.intersect1d(ar1, ar2))

Output:

[1,3,4]

Example 2:

Python




import numpy as np
  
  
ar1 = np.array([12, 14, 15, 16, 17])
ar2 = [2, 4, 5, 6, 7, 8, 9, 12]
  
# Common values between two arrays
print(np.intersect1d(ar1, ar2))

Output:

[12]
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