https://skullsinthestars.com/2023/07/22/how-fast-can-we-communicate-with-light-and-radio-waves
I’m pretty forgiving about reading mildly inaccurate physics stuff, especially when it’s in science fiction stories, but every once in a while I read a real zinger that nearly causes me…
https://skullsinthestars.com/2023/07/22/how-fast-can-we-communicate-with-light-and-radio-waves
I’m pretty forgiving about reading mildly inaccurate physics stuff, especially when it’s in science fiction stories, but every once in a while I read a real zinger that nearly causes me…
https://www.youtube.com/@avamogal55/videos
https://neon.kde.org/
KDE neon is the latest and greatest of KDE community software packaged on a rock-solid base.
If I want to link to a community X
on a Lemmy instance Y.zzz
, I know I should use the link /c/X@Y.zzz
, which will redirect to the copy of the instance on the server where the user has the account.
What is the analogous way to link to a post? For example this post has address lemmy.ca/post/1866360
but what link should I give to users on another instance, so that they can see the post in their instance?
https://doi.org/10.1093/mnras/stad2032
https://doi.org/10.1093/mnras/stad2032
Some large datasets are pushing memory and some functions I'm writing to the limit. I wanted to ask some questions about subsetting, of matrices and arrays in particular:
x <- matrix(rnorm(20*30), nrow=20, ncol=30)
y <- x[, 1:10]
Some exploration with object_size
from pryr
seems to indicate that a copy is made when y
is created, but I'd like to be sure.
x <- matrix(rnorm(20*30), nrow=20, ncol=30)
y <- dnorm(0, mean=x[,1:10], sd=1)
I wonder if the data in x[,1:10]
are copied and then given as input to dnorm
.
I've heard that data.table
allows one to work with subsets without copies being made (unless necessary), but it seems that one is constrained to two dimensions only – no arrays – that way.
Cheers!
@pglpm
@lemmy.ca