NA in data.table

Question

I have a data.table that contains some groups. I operate on each group and some groups return numbers, others return NA. For some reason data.ta

Answer 1

If you want to assign NAs to many variables, you could use the approach suggested here:

v_1  <- c(0,0,1,2,3,4,4,99)
v_2  <- c(1,2,2,2,3,99,1,0)
dat  <-  data.table(v_1,v_2)

for(n in 1:2) {
  chari <-  paste0(sprintf('v_%s' ,n), ' %in% c(0,99)')
  charj <- sprintf('v_%s := NA_integer_', n)
  dat[eval(parse(text=chari)), eval(parse(text=charj))]
}