arctan

Description

Calculate the arctangent of each element, that is, tan^-1(x).

Mandatory Input Parameters

Parameter	Type	Description
x	array_like	Input array or scalar

Optional Input Parameters

Parameter	Type	Default Value	Description
out	ndarray or ndarray tuple	None	Location where the calculation result is stored. If provided, it must have a shape which the inputs broadcast to. If not provided, a freshly-allocated array is returned.
where	array_like	None	This condition is broadcast over the input. At locations where the condition is true, the out array stores the result. Elsewhere, the out array retains its original value.
**kwargs	-	-	Other keyword arguments. Refer to the NumPy official document Universal functions (ufunc).

Return Value

Type	Description
ndarray/scalar	Arctangent of each element, in radians. The value range of the real part is [–π/2, π/2].

Examples

>>> import numpy as np
>>> np.pi / 4
0.7853981633974483
>>> np.tan([0., np.pi / 4])
array([0., 1.])
>>>
>>> np.arctan([0., 1.])
array([0.        , 0.78539816])
>>>

Parent topic: Basic Operation Functions