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log10(x)

Return the "principal value" (for a description of this, see :None:None:`numpy.log10`) of $log_{10}(x)$ . For real :None:None:`x > 0`, this is a real number ( log10(0) returns -inf and log10(np.inf) returns inf ). Otherwise, the complex principle value is returned.

Notes

For a log10() that returns NAN when real :None:None:`x < 0`, use :None:None:`numpy.log10` (note, however, that otherwise :None:None:`numpy.log10` and this log10 are identical, i.e., both return -inf for :None:None:`x = 0`, inf for :None:None:`x = inf`, and, notably, the complex principle value if x.imag != 0 ).

Parameters

x : array_like or scalar

The value(s) whose log base 10 is (are) required.

Returns

out : ndarray or scalar

The log base 10 of the x value(s). If x was a scalar, so is :None:None:`out`, otherwise an array object is returned.

Compute the logarithm base 10 of x.

See Also

numpy.log10

Examples

(We set the printing precision so the example can be auto-tested)

>>> np.set_printoptions(precision=4)
>>> np.emath.log10(10**1)
1.0
>>> np.emath.log10([-10**1, -10**2, 10**2])
array([1.+1.3644j, 2.+1.3644j, 2.+0.j    ])
See :

Back References

The following pages refer to to this document either explicitly or contain code examples using this.

numpy.lib.scimath.log10

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