knitr gets tricked by data.table `:=` assignment

Question

It seems that knitr doesn\'t understand that DT[, a:=1] should not result in an output of DT to the document. Is there a way to stop

Answer 1

I've run across the same problem and I solved it fairly easy by re-assigning the variable. In your case:

DT <- DT[, ':=' (c, 5)]

It's a bit more verbose though, especially if the variable name is big.