NAs replace - r

Question

I want to replace NA in columns campaign by "none". Campaign is character.

trx2[trx2$campaign=="<NA>"] <- "none"

but it gives me an error "missing values are not allowed in subscripted assignments of data frames".

Thank you for your help

Answer 1

The proper way to test for na values is is.na() ; moreover, you need to subset tr2x$campaign and not the whole data.frame. Hence :

trx2$campaign[is.na(trx2$campaign)] <- "none"