CODEWITHSUNDEEP
rlisttags
Julie Hardy
Julie Hardy

Reputation: 127

Convert two list in one list from R

I got two list

var1=c("fe1","fe2")
var2=c("A1","A2")

I try to do that with a loop for

list_final  <- list("fe1" = "A1", "fe2" = "A2")

My code is there

library("rlist")

list_final <-list()
for(i in var1) {
  for(d in var2) {
    x = setNames(i, paste0(d))
    list.append(list_final,x)
}
}

But the list is always empty

Upvotes: 1

Views: 52

Answers (4)

SummersKing
SummersKing

Reputation: 331

just like this: as.list(names(var2)<-var1)

Upvotes: 0

ThomasIsCoding
ThomasIsCoding

Reputation: 101848

If you have unique values in var1, you can try the code below with split

> split(var2,var1)
$fe1
[1] "A1"

$fe2
[1] "A2"

Otherwise, the method by @akrun should be applied

Upvotes: 0

Duck
Duck

Reputation: 39603

Also a loop approach can be useful:

#Data
var1=c("fe1","fe2")
var2=c("A1","A2")
#List
List <- list()
#Loop
for(i in 1:length(var1))
{
  List[[var1[i]]]<-var2[i]
}
List

Output:

List
$fe1
[1] "A1"

$fe2
[1] "A2"

Upvotes: 0

akrun
akrun

Reputation: 887311

We can use setNames to create a named vector and convert to a list with as.list in base R (without using a for loop)

list_final2 <- as.list(setNames(var2, var1))

-checking with OP's expected

identical(list_final, list_final2)
#[1] TRUE

Upvotes: 0

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