log10

Log base 10 of symbolic input

Syntax

log10(x)

log10(x) returns the logarithm to the base 10 of x. If x is an array, log10 acts element-wise on x.

Compute the log base 10 of numeric input.

log10(20)

ans =
    1.3010

Compute the log base 10 of symbolic input. The result is in terms of log.

syms x
f = x^2;
fLog10 = log10(f)

fLog10 =
log(x^2)/log(10)

Convert symbolic output to double by substituting for x with a number using subs, and then using double.

fLog10 = subs(fLog10,x,5);        % x is 5
fLog10 = double(fLog10)

fLog10 =
    1.3979

Input, specified as a number, vector, matrix, or array, or a symbolic number, variable, array, function, or expression.