Mathematical functions with automatic domain#

Note

numpy.emath is a preferred alias for numpy.lib.scimath, available after numpy is imported.

Wrapper functions to more user-friendly calling of certain math functions whose output data-type is different than the input data-type in certain domains of the input.

For example, for functions like log with branch cuts, the versions in this module provide the mathematically valid answers in the complex plane:

>>> import math
>>> np.emath.log(-math.exp(1)) == (1+1j*math.pi)
True

Similarly, sqrt, other base logarithms, power and trig functions are correctly handled. See their respective docstrings for specific examples.

Functions#

`arccos`(x)	Compute the inverse cosine of x.
`arcsin`(x)	Compute the inverse sine of x.
`arctanh`(x)	Compute the inverse hyperbolic tangent of x.
`log`(x)	Compute the natural logarithm of x.
`log2`(x)	Compute the logarithm base 2 of x.
`logn`(n, x)	Take log base n of x.
`log10`(x)	Compute the logarithm base 10 of x.
`power`(x, p)	Return x to the power p, (x**p).
`sqrt`(x)	Compute the square root of x.