nlcpy.tan

nlcpy.tan = <ufunc 'nlcpy_tan'>

Computes the element-wise tangent.

Parameters

xarray_like

Input an array or a scalar in radians.

outndarray or None, optional

A location into which the result is stored. If provided, it must have a shape that the inputs broadcast to. If not provided or None, a freshly-allocated array is returned. A tuple (possible only as a keyword argument) must have length equal to the number of outputs.

wherearray_like, optional

This condition is broadcast over the input. At locations where the condition is True, the out array will be set to the ufunc result. Elsewhere, the out array will retain its original value. Note that if an uninitialized out array is created via the default out=None, locations within it where the condition is False will remain uninitialized.

**kwargs

For other keyword-only arguments, see the section Optional Keyword Arguments.

Returns

yndarray

The tangent values for each element of x. If x is a scalar, this function returns the result as a 0-dimension ndarray.

参考

arctan

Computes the element-wise inverse tangent.

tanh

Computes the element-wise hyperbolic tangent.

Examples

>>> import nlcpy as vp
>>> from math import pi
>>> vp.tan(vp.array([-pi,pi/2,pi]))  
array([ 1.22464659e-16,  1.63312422e+16, -1.22464659e-16])
>>>
>>> # Example of providing the optional output parameter illustrating
>>> # that what is returned is a reference to said parameter
>>> out1 = vp.array([0], dtype='d')
>>> out2 = vp.tan([0.1], out=out1)
>>> out2 is out1
True