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Took me a minute. (lemmy.dbzer0.com)
submitted 2 years ago by [email protected] to c/[email protected]
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[-] [email protected] 43 points 2 years ago* (last edited 2 years ago)

I was a bit disappointed to learn that math-related Python packages don't seem to have an ln function. They all use log for the natural log and also have a log10.

[-] [email protected] 22 points 2 years ago

Base e is considered the natural logarithm and is what you'll get if you call log in most programming languages targeted at math.

[-] [email protected] 3 points 2 years ago

Why is that, off the top of my head I don't remember seeing base e logarithms too often, why are they so important?

[-] [email protected] 4 points 2 years ago* (last edited 2 years ago)

They get used all over especially in differential equations.

Log10 basically only comes up in statistics for doing a log plot in base 10.

Basically high school math won't use the natural log much, but once you hit university higher level math it becomes apparent it's the one everyone actually uses regularly.

[-] [email protected] 11 points 2 years ago

You know what's even more dissapointing? bc - arbitrary precision calculator for linux shell uses 'l' for natural log, just a single letter.
And there's no other log function, so when you need logx(y) you write: ''l(y)/l(x)".

[-] [email protected] 7 points 2 years ago

Well that's annoying..

[-] [email protected] 5 points 2 years ago

Make your own package, or just macro that shit.

[-] [email protected] 4 points 2 years ago

even Matlab suffers from this

[-] [email protected] 7 points 2 years ago
[-] [email protected] 1 points 2 years ago

Yes? Suffer -> Suffering / Suffers ? Is this not correct?

[-] [email protected] 4 points 2 years ago

That’s because mathematicians use log for the natural logarithm. Log base 10 would be log_10

[-] [email protected] 11 points 2 years ago
[-] [email protected] 94 points 2 years ago* (last edited 2 years ago)

"ln(x)" is another way of writing log sub e of x https://en.m.wikipedia.org/wiki/Natural_logarithm

The "ln" of the "you son of a bitch. I'm ln" is referencing that identity

[-] [email protected] 13 points 2 years ago
[-] [email protected] 11 points 2 years ago* (last edited 2 years ago)

ln(x) (I believe abbreviated from the french logarithme naturel) is the same as the logarithm of x base e (log~e~(y))

Edit: ~subscript~ doesn't seem to work for me on Jerboa but I'm keeping it as it is

[-] [email protected] 6 points 2 years ago

It's also called logarithme népérien, for Jonh Napier, mathematician who discovered a lot of the properties of the logarithmic function.

[-] [email protected] 6 points 2 years ago* (last edited 2 years ago)

Checking if ~thunder~ can subscript...

Edit: Nope, it can't...

[-] [email protected] 4 points 2 years ago

Pretty sure that superscript is using ^circumflex^

[-] [email protected] 4 points 2 years ago
[-] [email protected] 2 points 2 years ago

Huh you are right. It only works on the web frontend, not on the mobile apps.

[-] [email protected] 5 points 2 years ago

ln you a hand

this post was submitted on 17 Sep 2023
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