Hey there, i'm having some list struggles at the moment and curious everyones thoughts.
I have a list of lists, and the sublists all follow the same structure:
dat <- list(list(a = NULL,
b = data.frame(x = c(1:10),
y = c(1:10)),
c = NULL),
list(a = data.frame(x = c(1:10),
y = c(1:10)),
b = NULL,
c = data.frame(x = c(1:10),
y = c(1:10))),
list(a = NULL,
b = NULL,
c = data.frame(x = c(1:10),
y = c(1:10))),
list(a = data.frame(x = c(1:10),
y = c(1:10)),
b = data.frame(x = c(1:10),
y = c(1:10)),
data.frame(x = c(1:10),
y = c(1:10))))
So each sublist has a, b, c. Sometimes they can be null other times they'll have a dataframe (well tibble in my actual case).
What I want to do is create 3 new objects that extract the "a", "b", "c" respectively. I'm expecting it to be a list type but I can't quite seem to puzzle out how to extract the sublist based on the name of the list.
I'm trying to do something like the following:
a <- dat |>
purrr::keep(\(x) names(x) == "a")
but this won't work because the names(x) returns a vector of length three and isn't necessarily a predicate function. I almost need just a singular "name" rather than "names" here.
Any thoughts?
Ultimately, i'm hoping to have an output like:
a <- list(a = NULL,
a = data.frame(x = c(1:10),
y = c(1:10)),
a = NULL,
a = data.frame(x = c(1:10),
y = c(1:10)))
b <- list(b = data.frame(x = c(1:10),
y = c(1:10)),
b = NULL,
b = NULL,
b = data.frame(x = c(1:10),
y = c(1:10)))
d <- list(d = NULL,
d = data.frame(x = c(1:10),
y = c(1:10)),
d = data.frame(x = c(1:10),
y = c(1:10)),
d = data.frame(x = c(1:10),
y = c(1:10)))
Hey there, i'm having some list struggles at the moment and curious everyones thoughts. I have a list of lists, and the sublists all follow the same structure:
So each sublist has a, b, c. Sometimes they can be null other times they'll have a dataframe (well tibble in my actual case). What I want to do is create 3 new objects that extract the "a", "b", "c" respectively. I'm expecting it to be a list type but I can't quite seem to puzzle out how to extract the sublist based on the name of the list. I'm trying to do something like the following:
but this won't work because the
names(x)returns a vector of length three and isn't necessarily a predicate function. I almost need just a singular "name" rather than "names" here. Any thoughts? Ultimately, i'm hoping to have an output like: