numpy.logical_not() in Python

Last Updated : 29 Nov, 2018
Comments
Improve
Suggest changes
Like Article
Like
Report
numpy.logical_not(arr, out=None, where = True, casting = 'same_kind', order = 'K', dtype = None, ufunc 'logical_not') : This is a logical function that computes the truth value of NOT arr element-wise. Parameters :
arr1 : [array_like]Input array. 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 Boolean results of NOT arr (element-wise).
  Code 1 : Working Python 
# Python program explaining
# logical_not() function
import numpy as np

# input
arr1 = [1, 3, False, 4]
arr2 = [3, 0, True, False]

# output
out_arr1 = np.logical_not(arr1)
out_arr2 = np.logical_not(arr2)

print ("Output Array 1 : ", out_arr1)
print ("Output Array 2 : ", out_arr2)
Output : 
Output Array 1 :  [False False  True False]
Output Array 2 :  [False  True False  True]
  Code 2 : Can check condition Python 
# Python program explaining
# logical_not() function
import numpy as np

# input
arr1 = np.arange(8)

# Applying Condition 
print ("Output : \n", arr1/4)

# output
out_arr1 = np.logical_not(arr1/4 == 0)

print ("\n Boolean Output : \n", out_arr1)
Output : 
Output : 
 [ 0.    0.25  0.5   0.75  1.    1.25  1.5   1.75]

 Boolean Output : 
 [False  True  True  True  True  True  True  True]
References : https://docs.scipy.org/doc/numpy-1.13.0/reference/generated/numpy.logical_not.html#numpy.logical_not .

Next Article
numpy.logical_not() in Python
author
mohit gupta_omg :)
Improve
Article Tags :
Practice Tags :

Similar Reads