`numpy.lib.scimath:log10`

source: build-install/usr/lib/python3.14/site-packages/numpy/lib/_scimath_impl.py :291

Signature

def log10 ( x )

Summary

Compute the logarithm base 10 of x.

Extended Summary

Return the "principal value" (for a description of this, see numpy.log10) of $l o g_{10} (x)$ . For real x > 0, this is a real number (log10(0) returns -inf and log10(np.inf) returns inf). Otherwise, the complex principle value is returned.

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 out, otherwise an array object is returned.

Notes

For a log10() that returns NAN when real x < 0, use numpy.log10 (note, however, that otherwise numpy.log10 and this log10 are identical, i.e., both return -inf for x = 0, inf for x = inf, and, notably, the complex principle value if x.imag != 0).

Examples

import numpy as np

✓

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

np.set_printoptions(precision=4)

✓

np.emath.log10(10**1)

✗

np.emath.log10([-10**1, -10**2, 10**2])

✓

Aliases

numpy.emath.log10