CODEWITHSUNDEEP
rlistna
bttomio
bttomio

Reputation: 2306

Searching for NA in a list of lists

Is it possible to locate NAs (missing values) and return their location with both list and column?

Please consider this data:

list1 <- list(a = c(1, 2), b = c(3, 4), c = c(5, NA))
list2 <- list(d = c(6, 7), e = c(8, 9), f = c("a", "b"))
mylist <- mget(c("list1", "list2"))

The expected return would be something like list1$c.

I tried to use rlist with the function list.search. Thank you in advance for your help.

Upvotes: 0

Views: 665

Answers (1)

rodrigocfaria
rodrigocfaria

Reputation: 440

A pretty straightforward approach would be using rapply with is.na(). Something like this would be close to your desired result:

> rapply(mylist, is.na)
   a1    a2    b1    b2    c1    c2    d1    d2    e1    e2    f1    f2 
FALSE FALSE FALSE FALSE FALSE  TRUE FALSE FALSE FALSE FALSE FALSE FALSE 

> which(rapply(mylist, is.na))
c2 
 6

Upvotes: 1

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