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:
1 2 3 4 | >>> import math>>> from numpy.lib import scimath>>> scimath.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.
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