[R] remove repeated string in list

[JS Huang]

Hi,

  To avoid hardcoded 1:3, here is some revision.

> temp
$set1
[1] "a" "b" "d" "x"

$set2
[1] "b" "c" "q" "m"

$set3
[1] "b" "f" "e" "k" "q" "h"

> sapply(1:*length(temp)*,function(x){temp[[x]][as.numeric(table(unlist(temp))[temp[[x]]])==1]})
[[1]]
[1] "a" "d" "x"

[[2]]
[1] "c" "m"

[[3]]
[1] "f" "e" "k" "h"



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