CODEWITHSUNDEEP
r
zahra abdi
zahra abdi

Reputation: 337

{ : missing value where TRUE/FALSE needed

Here is my code:

tst <- data.frame(ref=c("A", "T", "C", "C", "G", "G"),
                      alt= c("AAA", "T", "A", "ATCGA", "G", "A"))
for(i in 1:nrow(tst)){
  if(tst[i,2] == "A"){
    tst <- tst[-i,]
  }
}

but I received this error :

Error in if (tst[i, 2] == "A") { : missing value where TRUE/FALSE needed

Now I don't know how to solve it, Thanks for any help

Upvotes: 1

Views: 1142

Answers (1)

St&#233;phane Laurent
St&#233;phane Laurent

Reputation: 84659

When i=3, one has tst[i,2] == "A", so tst is transformed: tst <- tst[-3,]. Originally, tst has 6 rows, but now it has only 5 rows. And you get the 'missing value' message when i reaches 6, because there's no row 6 anymore.

Upvotes: 2

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