CODEWITHSUNDEEP
matlab
ddol
ddol

Reputation: 31

Why does it different beween log() and log(double()) in Matlab?

I'm shocked about the difference between log and log(double) in matlab. as I know, log(255) = 2.4065... but my matlab is 5.5413. How could it difference between them? Is this bug?

Upvotes: 0

Views: 73

Answers (1)

TroyHaskin
TroyHaskin

Reputation: 8401

Matlab's log function is base e (that's your 5.54...). I think you're looking for log10 (that's your 2.40...).

Most programming languages that come to mind (MATLAB, Fortran, C, PHP, Javascript) default to using log for the natural logarithm without a base specified. I'd say, arguably, it is because logarithms involving e are much more prevalent than those involving 10 (though they are usually important enough to receive a function of their own).

Upvotes: 4

Related Questions