numpy.divide() in Python

Last Updated : 29 Nov, 2018

numpy.divide(arr1, arr2, out = None, where = True, casting = 'same_kind', order = 'K', dtype = None) : Array element from first array is divided by elements from second element (all happens element-wise). Both arr1 and arr2 must have same shape and element in arr2 must not be zero; otherwise it will raise an error. Parameters :

arr1 : [array_like]Input array or object which works as dividend. arr2 : [array_like]Input array or object which works as divisor. out : [ndarray, 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 arr1/arr2(element-wise) as elements of output array.

Code 1 : arr1 divide by arr2 elements

Python

# Python program explaining
# divide() function
import numpy as np

# input_array
arr1 = [2, 27, 2, 21, 23]
arr2 = [2, 3, 4, 5, 6]
print ("arr1         : ", arr1)
print ("arr2         : ", arr2)

# output_array
out = np.divide(arr1, arr2)
print ("\nOutput array : \n", out)

Output :

arr1         :  [2, 27, 2, 21, 23]
arr2         :  [2, 3, 4, 5, 6]

Output array : 
 [ 1.          9.          0.5         4.2         3.83333333]

Code 2 : elements of arr1 divided by divisor

Python

# Python program explaining
# divide() function
import numpy as np

# input_array
arr1 = [2, 27, 2, 21, 23]
divisor = 3
print ("arr1         : ", arr1)

# output_array
out = np.divide(arr1, divisor)
print ("\nOutput array : \n", out)

Output :

arr1         :  [2, 27, 2, 21, 23]

Output array : 
 [ 0.66666667  9.          0.66666667  7.          7.66666667]

Code 3 : warning if arr2 has element = 0

Python

# Python program explaining
# divide() function
import numpy as np

# input_array
arr1 = [2, 27, 2, 21, 23]
arr2 = [2, 3, 0, 5, 6]
print ("arr1         : ", arr1)
print ("arr2         : ", arr2)

# output_array
out = np.divide(arr1, arr2)
print ("\nOutput array : ", out)

Output :

arr1         :  [2, 27, 2, 21, 23]
arr2         :  [2, 3, 0, 5, 6]

Output array :  [ 1.          9.                 inf  4.2         3.83333333]
RuntimeWarning: divide by zero encountered in true_divide
  out = np.power(arr1, arr2)

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

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