[datatable-help] Subsetting columns in data.table

[Berto]

Matthew Dowle wrote
> othercols = setdiff(names(DT5),c("x","y"))
> DT5[y<=3 & Reduce(`&`,lapply(DT5[,othercols,with=FALSE],`<=`,7)), 
> max(y), by=x]
>     x V1
> 1: a  3
> 2: b  1

Many thanks, Matthew!

That's exactly what I was looking for.
 
Congratulations for the great package and thank you for the advice!

 Berto



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