this post was submitted on 17 Sep 2023
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[–] Ragdoll_X@lemmy.world 43 points 2 years ago* (last edited 2 years ago) (6 children)

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.

[–] Afrazzle@sh.itjust.works 22 points 2 years ago (1 children)

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

[–] Redex68@lemmy.world 3 points 2 years ago (1 children)

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

[–] LaLiLuLuCo@lemmy.ca 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.

[–] janAkali@lemmy.one 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)".

Well that's annoying..

[–] NightAuthor@lemmy.world 5 points 2 years ago

Make your own package, or just macro that shit.

[–] Ozzy@lemmy.ml 4 points 2 years ago (1 children)

even Matlab suffers from this

[–] vivadanang@lemm.ee 7 points 2 years ago (1 children)
[–] Ozzy@lemmy.ml 1 points 2 years ago (1 children)

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

[–] WilloftheWest@feddit.uk 4 points 2 years ago

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

[–] 0_0j@lemmy.world 12 points 2 years ago (3 children)
[–] mkwarman@lemmy.mkwarman.com 95 points 2 years ago* (last edited 2 years ago) (2 children)

"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

[–] Masimatutu@lemm.ee 11 points 2 years ago* (last edited 2 years ago) (2 children)

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

[–] driving_crooner@lemmy.eco.br 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.

[–] 0_0j@lemmy.world 6 points 2 years ago* (last edited 2 years ago) (2 children)

Checking if ~thunder~ can subscript...

Edit: Nope, it can't...

[–] zzzz@lemmy.world 4 points 2 years ago (1 children)
[–] 0_0j@lemmy.world 3 points 2 years ago
[–] DmMacniel@feddit.de 4 points 2 years ago (1 children)

Pretty sure that superscript is using ^circumflex^

[–] mexicancartel@lemmy.dbzer0.com 4 points 2 years ago (1 children)
[–] DmMacniel@feddit.de 2 points 2 years ago

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

[–] OrteilGenou@lemmy.world 5 points 2 years ago

ln you a hand