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Log base 10 of symbolic input
log10(x)
log10(x) returns the logarithm to the base 10 of x. If x is an array, log10 acts element-wise on x.
x
10
log10
example
collapse all
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.
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.
subs
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.
Introduced before R2006a
log | log2
log2
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