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numpy.floor_divide() in Python

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  • Difficulty Level : Medium
  • Last Updated : 29 Nov, 2018

numpy.floor_divide(arr1, arr2, /, out = None, where = True, casting = ‘same_kind‘, order = ‘K‘, dtype = None) :

Array element from first array is divided by the elements from second array(all happens element-wise). Both arr1 and arr2 must have same shape.
It is equivalent to the Python // operator and pairs with the Python % (remainder), function so that b = a % b + b * (a // b) up to roundoff.

Parameters :

arr1     : [array_like]Input array or object which works as numerator.

arr2     : [array_like]Input array or object which works as denominator. 

out      : [ndarray, None, optional]Output array with same dimensions as
           Input array, placed with result.

**kwargs : Allows you to pass keyword variable length of argument to a function. 
            It is used when we want to handle named argument in a function.

where    : [array_like, optional]True value means to calculate the universal 
            functions(ufunc) at that position, False value means to leave the 
            value in the output alone.

Return :

An array with floor(x1 / x2)

 
Code 1 : arr1 divided by arr2




# Python program explaining
# floor_divide() function
import numpy as np
  
# input_array
arr1 = [2, 2, 2, 2, 2]
arr2 = [2, 3, 4, 5, 6]
print ("arr1         : ", arr1)
print ("arr1         : ", arr2)
  
# output_array
out = np.floor_divide(arr1, arr2)
print ("\nOutput array : ", out)


Output :

arr1         :  [2, 2, 2, 2, 2]
arr1         :  [2, 3, 4, 5, 6]

Output array :  [1 0 0 0 0]

 
Code 2 : elements of arr1 divided by divisor




# Python program explaining
# floor_divide() function
import numpy as np
  
# input_array
arr1 = [2, 7, 3, 11, 4]
divisor = 3
print ("arr1         : ", arr1)
  
# output_array
out = np.floor_divide(arr1, divisor)
print ("\nOutput array : ", out)


Output :

arr1         :  [2, 7, 3, 11, 4]

Output array :  [0 2 1 3 1]

 
Code 3 : floor_divide handling results if arr2 has -ve elements




# Python program explaining
# floor_divide() function
import numpy as np
  
# input_array
arr1 = [2, 6, 21, 21, 12]
arr2 = [2, 3, 4, -3, 6]
print ("arr1         : ", arr1)
print ("arr2         : ", arr2)
  
# output_array
out = np.floor_divide(arr1, arr2)
print ("\nOutput array : ", out)


Output :

arr1         :  [2, 6, 21, 21, 12]
arr2         :  [2, 3, 4, -3, 6]

Output array :  [ 1  2  5 -7  2]

References :
https://docs.scipy.org/doc/numpy-1.13.0/reference/generated/numpy.floor_divide.html
.


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