  # numpy.copysign () in Python

NumPy | Python Methods and Functions

` numpy.copysign (arr1, arr2, out = None, where = True, casting = & # 39; same_kind & # 39 ;, order = & # 39; K & # 39 ;, dtype = None ) `: This math function helps the user to change the sign of arr1 and arr2. And arr1 or arr2 can be a list / sequence or scalar value. If a sequence, both must have the same dimension; otherwise arr2 can be a scalar value.

Parameters:
arr1: [array_like] Input array, values ​​to change sign of.
arr2: [array_like] Input array, values ​​to change sign of.
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: x1 with sign of x2.

Code # 1:

 ` # Python program illustrating ` ` # copysign () method `` import numpy as np    arr1 = [ 1 , - 23 , + 34 , 11 ] arr2 = [ - 1 , 2 , - 3 , - 4 ]    print ( "arr1:" , arr1) print ( "arr2:" , arr2)   print ( "Check sign of arr1: " , np.signbit (arr1)) print ( "Check sign of arr2:" , np.signbit (arr1)) print ( "Check for copysign:" , np.signbit (np.copysign (arr1, arr2))) `

Output:

` arr1: [1, -23, 34, 11] arr2: [-1, 2, -3, -4] Check sign of arr1: [False True False False] Check sign of arr2: [False True False False] Check for copysign: [True False True True] `

Code # 2:

 ` # Python program illustrating ` ` # copysign () method `` `` import numpy as np `   ` arr1 ` ` = ` ` [` ` 1 ` `, ` ` - ` ` 23 ` `, ` ` + ` ` 34 ` `, ` ` 11 ` `] `   ` print ` ` (` ` "Check sign of arr2:" ` `, np.signbit (arr1)) ` ` print ` ` (` ` "Check for copysign:" ` `, np.signbit (np.copysign (arr1, ` ` - ` ` 3 ` `))) `

Exit:

` Check sign of arr2: [False True False False] Check for copysign: [True True True True] `