CODEWITHSUNDEEP
r
Elif
Elif

Reputation: 41

How to sort elements of a vector due to another data?

I have a vector which is like c(x, y, z), and lists like;

x <- list("a"= 2, "b"= 3)
y <- list("a"= 1, "c"= 4)
z <- list("a"= 3, "d"= 5)

which has the same names with elements of the initial vector. I want to sort the vector due to scores of "a" within lists.

The expected result is c(y, x, z). Every help will be appreciated.

Upvotes: 2

Views: 87

Answers (3)

akrun
akrun

Reputation: 886948

An option with map

library(tidyverse)
list(x, y, z) %>%
    map_dbl(pluck, "a") %>%
    order %>% 
   c('x', 'y', 'z')[.]
#[1] "y" "x" "z"

Upvotes: 0

maydin
maydin

Reputation: 3755

A base R approach,

x <- list("a"= 2, "b"= 3)
y <- list("a"= 1, "c"= 4)
z <- list("a"= 3, "d"= 5)

v  <- c("x", "y", "z")

names(sort(sapply(v, function(i){get(i)[["a"]]})))

gives,

"y" "x" "z"

Upvotes: 1

Tlatwork
Tlatwork

Reputation: 1525

You could do:

f <- list(x, y, z)
f[order(unlist(sapply(f, "[", "a")))]

Upvotes: 1

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