Python OpenCV - haveImageWriter() function

Compute the square root of negative input with emath in Python

Last Updated : 01 May, 2022

In this article, we will cover how to compute the square root of negative inputs with emath in Python using NumPy.

Example:

Input: [-3,-4]
Output: [0.+1.73205081j 0.+2.j        ]
Explanation: Square root of a negative input.

NumPy.emath.sqrt method:

The np.emath.sqrt() method from the NumPy library calculates the square root of complex inputs. A complex value is returned for negative input elements unlike numpy.sqrt. which returns NaN.

Syntax: np.emath.sqrt()

Parameters:

x: array like object.

Return: out: scalar or ndarray.

Example 1:

If the array contains negative input values, complex numbers are returned in the output, and the shape, datatype, and dimensions of the array can be found by .shape, .dtype, and .ndim attributes.

Python3

import numpy as np 
  
# Creating an array 
arr = np.array([-3, -4]) 
print(array) 
  
# shape of the array is 
print("Shape of the array is : ",arr.shape) 
  
# dimension of the array 
print("The dimension of the array is : ",arr.ndim) 
  
# Datatype of the array 
print("Datatype of our Array is : ",arr.dtype) 
  
# computing the square root of negative inputs 
print(np.emath.sqrt(arr))

Output:

[-3 -4]
Shape of the array is :  (2,)
The dimension of the array is :  1
Datatype of our Array is :  int64
[0.+1.73205081j 0.+2.j        ]

Example 2:

Python3

import numpy as np 
  
# Creating an array 
array = np.arr([complex(-2, -1),complex(-5, -3)]) 
print(array) 
  
# shape of the array is 
print("Shape of the array is : ",arr.shape) 
  
# dimension of the array 
print("The dimension of the array is : ",arr.ndim) 
  
# Datatype of the array 
print("Datatype of our Array is : ",arr.dtype) 
  
# computing the square root of complex inputs 
print(np.emath.sqrt(arr))

Output:

[-2.-1.j -5.-3.j]
Shape of the array is :  (2,)
The dimension of the array is :  1
Datatype of our Array is :  complex128
[0.34356075-1.45534669j 0.64457424-2.32711752j]

Python OpenCV - haveImageWriter() function

isitapol2002

Improve

Article Tags :

Practice Tags :

python

Similar Reads

Compute the square root of complex inputs with scimath in Python

In this article, we will cover how to compute the square root of complex inputs with scimath in Python using NumPy. ExampleInput: [-1 -2] Output: [0.+1.j 0.+1.41421356j] Explanation: Square root of complex input.NumPy.emath.sqrt method The np.emath.sqrt() method from the NumPy library calculates the

How to compute the inverse of a square matrix in PyTorch

In this article, we are going to cover how to compute the inverse of a square matrix in PyTorch. torch.linalg.inv() method we can compute the inverse of the matrix by using torch.linalg.inv() method. It accepts a square matrix and a batch of the square matrices as input. If the input is a batch of t

Compute the inverse cosine with scimath in Python

In this article, we will compute the inverse cosine with scimath in Python using NumPy. numpy.arccos method A NumPy array can be created in different ways like, by various numbers, and by defining the size of the Array. It can also be created with the use of various data types such as lists, tuples,

Compute the inverse sine with scimath using NumPy in Python

In this article, we will cover how to compute the inverse sine with scimath in Python. np.emath.arcsin method A NumPy array can be created in different ways like, by various numbers, and by defining the size of the Array. It can also be created with the use of various data types such as lists, tuple

How to perform modulo with negative values in Python?

Taking the modulo of a negative number is a bit more complex mathematics which is done behind the program of Python. If we don't understand the mathematics behind the modulo of negative numbers then it will become a huge blunder. Mathematics behind the negative modulo : Let's Consider an example, wh

Compute the logarithm base n with scimath in Python

In this article, we will be looking at the approach to computing the logarithm base n with scimath in Python. The NumPy package provides us the numpy.lib.scimath.logn() method to compute the logarithmic base n. the method takes log base n of x. Let's check the syntax to know the method better. The s

Compute the inverse hyperbolic tangent in Python

In this article, we will cover how to compute the inverse hyperbolic tangent in Python using NumPy. numpy.emath.arctanh methodThe inverse hyperbolic tangent is also called as arctanh or tanh-1. To compute the inverse hyperbolic tangent Python provides a method called arctanh which is present in nump

Compute the sign and natural logarithm of the determinant of an array in Python

In this article, we will cover how to compute the sign and natural logarithm of the determinant of an array in Python using NumPy. numpy.linalg.slogdet() method The numpy.linalg.slogdet() method provides us to compute the sign and natural logarithm of the determinant of an array in Python. A call to

Compute the logarithm base 10 with NumPy-scimath in Python

The NumPy package provides us with numpy.lib.scimath.log10 to Compute the logarithm base 10 with scimath in Python. Let's go through the syntax as per the following to understand the method much better. Syntax: lib.scimath.log10(x) Returns the "primary value" of (see numpy.log10). This is a real num

Why do we use plus or minus in square root?

The arithmetic value which is used for representing the quantity and used in making calculations are defined as Numbers. A symbol like â€œ4,5,6â€ which represents a number is known as a numeral. Without numbers, we can't do counting of things, dates, time, money, etc., these numbers are also used for m