CODEWITHSUNDEEP
rapplypaste
Dan
Dan

Reputation: 45

combining elements in a list of lists in R

I have a list called samples_ID with 116 vectors, each vectors has three elements like these:

"11"         "GT20-16829" "S27"

I wanna keep the 116 vectors, but combine the elements to a single element like this

"11_GT20-16829_S27"

I tried something like this

samples_ID_ <- paste(samples_ID, collapse = "_")

it returns a single vector, below is just a part of it:

..._c(\"33\", \"GT20-16846\", \"S24\")_c(\"33\", \"GT20-18142\", \"S72\")_c(\"34\", \"GT20-16819\", \"S50\")_c...

What am I doing wrong? Can you help me please? Thanks

Upvotes: 2

Views: 530

Answers (3)

ThomasIsCoding
ThomasIsCoding

Reputation: 101663

Another base R option using paste

do.call(paste, c(data.frame(t(list2DF(samples_ID))), sep = "_"))

or

do.call(paste, data.frame(do.call(rbind, samples_ID)), sep = "_"))

Upvotes: 0

akrun
akrun

Reputation: 887213

In base R, we can use sapply

sapply(samples_ID, paste, collapse="_")

Upvotes: 1

rjen
rjen

Reputation: 1972

A tidyverse option.

library(stringr)
library(purrr)

map(samples_ID, ~ str_c(., collapse = '_'))

# [[1]]
# [1] "11_GT20-16829_S27"
# 
# [[2]]
# [1] "12_GT20-16830_S28"

Data

samples_ID <- list(c("11", "GT20-16829", "S27"), c("12", "GT20-16830", "S28"
))

Upvotes: 2

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