[datatable-help] := and ':=" throwing errors

[carlsutton]

Thank you, I did not even think of wrapping in ( ) for the ':=" scenario. 
Feeling a bit silly about that.

Just fooling around I did discover that dt[, "new.var" := fun(var), by =
something] does work. 

For some reason I had been wrapping that (go figure), i.e.  dt[, .("new.var"
:= fun(var)), by = something] and that just gave error messages.   Two ways
to do it and I choose the wrong one both times.

Sincerely appreciate the help

Carl Sutton 



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Carl Sutton
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