Post ITT the last time you've used any logarithm other than ln

Post ITT the last time you've used any logarithm other than ln

>mfw I can't recall such an occasion since the days of calculus I

log base 2 in algorithms

I use it in chemistry and physics quite frequently

ive used logs of base 2 quite often as well as the natual log when doing continuous modeling

When using dB or dBW

>computational complexity
>information entropy
>prime numbers
>any time i have to 'undo' an exponential

In the notation I've been taught, ln(x) is the natural logarithm.

Thanks for reminding me, Ive used log base 10 in control theory.

In numerical mathematics you use loglog plots to base 10 or 2 on a daily basis to plot convergence rates. Of course, the base itself - like in pretty much all applications with logarithms - doesn't really matter, because it's just a matter of scaling.

What do you use it for in physics?

natural log ln is just log base e (couldnt tell if you knew that)

I've used [math]\log_{10}[/math] yesterday for solving a problem of Project Euler for the sum of the digits. Also, as , I use it for some plots where you need to show that a number converges at infinity.

pH and dB are the only major logarithmic functions that don't use lnX

Intensity of sound and light for one...

Any time any equation has an exponent, you can apply logarithmic rules

I use log2 all the time. Incredibly useful for comparing ratio values in genetics.

I think i did light and sound intensity logs in 1 exam then never again

You have to take logs in arbitrary bases for a lot of empirical relationships used in engineering, especially in fatigue and cycle life calculations.

About a year, since I stopped doing chem

I used log base 2 for real analysis hw yesterday

I use log 10 for power spectrums in nonlinear dynamics

this.

Base 10, for bode plots.

That's why mathematicians call the natural logarithm log rather than ln.