Log10

Log10[x]

gives the base-10 logarithm of x.

Details

  • Mathematical function, suitable for both symbolic and numerical manipulation.
  • Log10 gives exact rational number results when possible.
  • For certain special arguments, Log10 automatically evaluates to exact values.
  • Log10 can be evaluated to arbitrary numerical precision.
  • Log10 automatically threads over lists.

Examples

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Basic Examples  (5)

Log10 gives the logarithm to base 10:

Plot over a subset of the reals:

Plot over a subset of the complexes:

Series expansion shifted from the origin:

Asymptotic expansion at a singular point:

Scope  (36)

Numerical Evaluation  (6)

Evaluate numerically:

Evaluate to high precision:

The precision of the output tracks the precision of the input:

Complex number inputs:

Evaluate efficiently at high precision:

Log10 can deal with realvalued intervals:

Log10 threads elementwise over lists and matrices:

Specific Values  (5)

Values of Log10 at fixed points:

Values at infinity:

Zero argument gives a symbolic result:

Zero of Log10:

Find a value of x for which the Log10[x]=0.5 using Solve:

Visualization  (3)

Plot the Log10 function:

Plot the real part of :

Plot the imaginary part of :

Polar plot with :

Function Properties  (4)

Log10 is defined for all positive values:

Log10 is defined for all nonzero complex values:

Log10 achieves all real values:

The range for complex values:

Log10 has a branch cut along the negative real axis:

TraditionalForm formatting:

Differentiation  (3)

First derivative:

Higher derivatives:

Plot the higher derivatives:

Formula for the ^(th) derivative:

Integration  (4)

Compute the indefinite integral using Integrate:

Definite integral:

Definite integral of Log10:

More integrals:

Series Expansions  (5)

Find the Taylor expansion using Series:

Plots of the first three approximations around :

General term in the series expansion using SeriesCoefficient:

FourierSeries:

Log10 can be applied to power series:

Asymptotic expansions at the branch cut:

Function Identities and Simplifications  (6)

Basic identity for Log10:

Logarithm of a power function simplification:

Simplify logarithms with assumptions:

Logarithm of a product:

Change of base:

Expand assuming real variables x and y:

Applications  (2)

Find the real exponent of a nonzero number:

Evaluate the transform at a point:

Plot the spectrum:

Plot both the spectrum and the plot phase using color:

Plot the spectrum in the complex plane using ParametricPlot3D:

Properties & Relations  (2)

Simplify the logarithm with assumptions:

Solve logarithmic equations:

Introduced in 2008
 (7.0)